Tornado พายุทอร์นาโด ถล่มอเมริกา

Tornadoes wreak havoc in US
SOURCE   :  www.boston.com

Tornadoes can form anytime of year, but occur most frequently in April, May, and June, due to favorable weather conditions. Earlier this week a massive 200-mile-per-hour EF5 tornado hit Moore, Okla., killing some two dozen people, damaging thousands of structures, and causing an estimated $2 billion in damage. This year, twisters have already touched down in Kansas, Texas, Tennessee, Mississippi, Missouri, and Alabama.

A woman carries a child through a field near the collapsed Plaza Towers Elementary School in Moore, Okla., on May 20. A tornado as much as half a mile wide with winds up to 200 mph roared through the Oklahoma City suburbs Monday, flattening entire neighborhoods, setting buildings on fire and landing a direct blow on an elementary school. (Sue Ogrocki/Associated Press)

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A tornado passes across south Oklahoma City, on May 20. (Paul Hellstern/The Oklahoman via Associated Press) #

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This image released by the Nasa on May 21and acquired on May 20 by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASAǃÙs Aqua satellite shows the storm system at 2:40 p.m. Central Daylight Time (19:40 Universal Time), just minutes before the devastating twister began. According to National Weather Service and media reports, the mile-wide tornado had a preliminary damage rating of EF-4, with winds reaching 190 miles per hour. It had a relatively slow forward speed for such a violent stormǃÓabout 20ǃÏ25 miles per hourǃÓlikely exacerbating the damage. Debris from the tornado fell as far as 100 miles (160 kilometers) away, reaching the city of Tulsa. The massive tornado that cut a wide and deadly swath through a suburban Oklahoma City town, killing 24 people, was a top category EF5 system with winds over 200 mph (321 kmh). (NASA) #

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A child is pulled from the rubble of the Plaza Towers Elementary School in Moore, Okla., and passed along to rescuers on May 20. A tornado as much as a mile (1.6 kilometers) wide with winds up to 200 mph (320 kph) roared through the Oklahoma City suburbs Monday, flattening entire neighborhoods, setting buildings on fire and landing a direct blow on an elementary school. (Sue Ogrocki/Associated Press) #

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This aerial photo shows the remains of homes hit by a massive tornado in Moore, Okla., on May 20. (Steve Gooch/Associated Press) #

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A woman is pulled out from under tornado debris at the Plaza Towers School in Moore, Okla., on May 20. (Sue Ogrocki/Associated Press) #

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Victor Gonzalez seeks shelter from the rain under a sheet of plastic as he helps a friend salvage items from a tornado-ravaged home on May 21 in Moore, Okla. A huge tornado roared through the Oklahoma City suburb Monday, flattening entire neighborhoods and destroying an elementary school with a direct blow as children and teachers huddled against winds. (Charlie Riedel/Associated Press) #

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Two men attempt to pry open a door on this car to check for victims in a business parking lot west of I-35 south of 4th Street in Moore, on May 20. (Jim Beckel/The Oklahoman via Associated Press) #

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A child is carried away from Briarwood Elementary school after a tornado destroyed the school in south Oklahoma City, on May 20. A monstrous tornado roared through the Oklahoma City suburbs, flattening entire neighborhoods with winds up to 200 mph, setting buildings on fire and landing a direct blow on an elementary school. (Paul Hellstern/The Oklahoman via Associated Press) #

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A fire burns in the Tower Plaza Addition in Moore, Okla., following a tornado on May 20. (Sue Ogrocki/Associated Press) #

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Cindy Wilson texts to friendson May 20 after her home was destroyed by a massive tornado that ripped through Moore, Okla., in the afternoon. Wilson and her husband, Staff Sgt. B. Wilson, took cover in their bathtub when the tornado hit. Cindy received a deep gash to her forehead and her wound was treated by first responders at the scene. (Jim Beckel/The Oklahoman via Associated Press) #

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People look for belongings after a tornado struck Moore, Okla., on May 20. (Gene Blevins/Reuters) #

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Grayson Hatfield crawls out of a closet underneath a stairwell at his sister's home along Kings Manor in Moore, Okla., on May 21. A massive tornado swept through the south Oklahoma City suburb Monday afternoon. (Brad Loper/The Dallas Morning News via Associated Press) #

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June Simson, right, receives a hug from her neighbor Jo McGee while embracing her cat Sammi after she found him standing on the rubble of her destroyed home on May 21 in Moore, Okla. Families returned to a blasted moonscape that had been an American suburb Tuesday after a monstrous tornado tore through the outskirts of Oklahoma City, killing at least 24 people. Entire neighborhoods vanished, with often the foundations being the only thing left of what used to be houses and cars tossed like toys and heaped in big piles. (Joshua Lott/AFP/Getty Images) #

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This aerial photo shows a home demolished home by Monday's tornado, in Moore, Okla., on May 21. The huge tornado roared through the Oklahoma City suburb Monday, flattening entire neighborhoods and destroying an elementary school with a direct blow as children and teachers huddled against winds. (Tony Gutierrez/Associated Press) #

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The owner of the building, Bernadette Prichard, looks over the damage to a preschool for the first time on May 21 from the tornado that hit Moore, Okla. (Katherine Taylor for The New York Times) #

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Oklahoma City firefighters check on the status of Gene Tripp as he sits in his rocking chair where his home once stood after being destroyed by a tornado that hit the area on May 20 in Oklahoma City, Okla. (Chris Landsberger/The Oklahoman via Associated Press) #

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Two men stand in front of Plaza Towers Elementary School in Moore, Okla., after a tornado destroyed the school on May 20. (Bryan Terry/The Oklahoman, via Associated Press) #

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Ryan Saum removes belongings from his car that was thrown onto Briarwood Elementary School by yesterday's tornado on May 21 in Moore, Okla. The town reported a tornado of at least EF4 strength and two miles wide that touched down yesterday killing at least 24 people and leveling everything in its path. President Barack Obama promised federal aid to supplement state and local recovery efforts. (Brett Deering/Getty Images) #

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A photo sat amongst the rubble a day after the tornado hit Moore, Okla., on May 20. (Katherine Taylor for The New York Times) #

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As his wife Cassidi looks over at him, Chad Heltcel, center, hands a newly-recovered antique doll cherished by his mother to Jimmy Hodges, as the Heltcel, family and friends salvaged the wreckage of their home which was destroyed Monday when a tornado moved through Moore, Okla., on May 21. (Brennan Linsley/Associated Press) #

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Amber Ford, a teaching assistant, goes through the rubble of a second grade classroom she works in at the Briarwood Elementary School in Oklahoma City, Okla., on May 21. (Michael Wyke/Tulsa World, via Associated Press) #

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Two frightened and apparently lost dogs sit on a coffee table top in a destroyed neighborhood in Moore, Okla., on May 21. The town was hit by a tornado on May 20 killing 24 people including seven children in one school. (Tannen Maury/European Pressphoto Agency) #

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Volunteers from Mercy Chefs distribute hot food to tornado victims at their devastated neighborhood on May 21 in Moore, Okla. Families returned to a blasted moonscape that had been an American suburb Tuesday after a monstrous tornado tore through the outskirts of Oklahoma City. (Jewel Samad/AFP/Getty Images) #

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A woman searches for possessions at sunset on May 21 after the suburb of Moore, Okla., was left devastated by a tornado the day before. Rescuers went building to building in search of victims and survivors picked through the rubble of their shattered homes on Tuesday, a day after a massive tornado tore through the Oklahoma City suburb of Moore, wiping out blocks of houses and killing 24 people. (Adrees Latif/Reuters) #

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US Soldiers and Airmen with the Oklahoma Army National Guard and the Oklahoma Air National Guard along with firefighters participate in recovery efforts after a tornado moved through on May 20 in Moore, Okla. The town reported a tornado to be at least EF4 strength and two miles wide that touched down Monday leveling everything in its path. (Sgt. 1st Class Kendall James/US Department of Defense via Getty Images) #

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As dawn breaks, storm clouds roll in over a destroyed neighborhood the day after a tornado hit in Moore, Okla. President Barack Obama declared the area a major disaster in Oklahoma. (Ed Zurga/European Pressphoto Agency) #

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Derick Brock from Mercy Chefs, right, helps a man to fold a US flag he found in the debris of a tornado devastated house on May 21 in Moore, Okla. Families returned to a blasted moonscape that had been an American suburb Tuesday after a monstrous tornado tore through the outskirts of Oklahoma City, killing at least 24 people. (Jewel Samad/AFP/Getty Images) #

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Susan Kates salvages items from a friend's tornado-ravaged home on May 22, in Moore, Okla. Cleanup continues two days after a huge tornado roared through the Oklahoma City suburb, flattening a wide swath of homes and businesses. (Charlie Riedel/Associated Press) #

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Charles Taber opens the two-week old storm shelter that saved his life in the May 20 tornado in Oklahoma City, Okla., on May 22. Rescue workers with sniffer dogs picked through the ruins on Wednesday to ensure no survivors remained buried after a deadly tornado left thousands homeless and trying to salvage what was left of their belongings. Taber was one of the nine people who rode out the storm in the shelter. (Rick Wilking/Reuters) #

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The funnel of a tornadic thunderstorm almost touches the ground near South Haven, Kan., on May 19. A massive storm front swept north through the central United States on Sunday, hammering the region with fist-sized hail, blinding rain and tornadoes, including a half-mile wide twister that struck near Oklahoma City. (Gene Blevins/Reuters) #

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A door from a house is pierced by a tree limb in the destroyed Rancho Brazos neighborhood os Granbury, Texas, on May 16. A rash of tornadoes slammed into several small communities in North Texas overnight, leaving at least six people dead, dozens more injured and hundreds homeless. (Paul Moseley/Star-Telegram via Associated Press) #

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A tornado caused extensive damage along Interstate 40 at the junction with US 177 on the west side of Shawnee, Okla., on May 19. (im Beckel/The Oklahoman via Associated Press) #

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A cleared home foundation stands out among the rubble in Granbury, Texas on May 16. Ten tornadoes touched down in several small communities in North Texas overnight, leaving at least six people dead, dozens injured and hundreds homeless. (Ron T. Ennis/The Fort Worth Star-Telegram via Associated Press) #

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A toppled car and crushed trees lay next to the slab of a house swept off its foundation in the destroyed Rancho Brazos neighborhood of Granbury, Texas, on May 16. (Paul Moseley/Fort Worth Star-Telegram via Associated Press) #

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Intact homes (upper left) stand next to totally destroyed dwellings showing the path of the May 20 tornado in Oklahoma City, Okla., on May 22. Rescue workers with sniffer dogs picked through the ruins on Wednesday to ensure no survivors remained buried after a deadly tornado left thousands homeless and trying to salvage what was left of their belongings. Curvature of horizon in the photo is due to an ultra-wide angle lens. (Rick Wilking/Reuters) #

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Police stand beside two men sitting handcuffed on the street whom they have detained on suspicion of looting in Moore, Okla., on May 21. (Rick Wilking/Reuters) #

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Volunteers form a chain as they retrieve clothing and other household items at a home destroyed by a tornado, across the street from the Plaza Towers elementary school in Moore, Okla., on May 22. The massive tornado on Monday afternoon flattened entire blocks of the town, killed at least 24 people and injured about 240 in Moore. (Rick Wilking/Reuters) #

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Sarah Dick reads a Doctor Suess book to her three-year-old daughter Jadyn at the driveway of her tornado-destroyed house in Oklahoma City, Okla., on May 22. Rescue workers with sniffer dogs picked through the ruins on Wednesday to ensure no survivors remained buried after a deadly tornado left thousands homeless and trying to salvage what was left of their belongings. (Rick Wilking/Reuters) #

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A volunteer arranges clothings for tornado victims at a roadside relief camp on May 22 in Moore, Okla. As rescue efforts in Oklahoma wound down, residents turned to the daunting task of rebuilding a US heartland community shattered by a vast tornado that killed at least 24 people. The epic twister, two miles (three kilometers) across, flattened block after block of homes as it struck mid-afternoon on May 20, hurling cars through the air, downing power lines and setting off localized fires in a 45-minute rampage. (Jewel Samad/AFP/Getty Images) #

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Macie Thompson looks over damage at Briarwood Elementary School on May 21 after a powerful tornado ripped through the area the day before in Moore, Okla. The town reported a tornado of at least EF4 strength and two miles wide that touched down yesterday killing at least 24 people and leveling everything in its path. (Scott Olson/Getty Images) #

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Matt Johnson salvages items on May 21 from his grandparent's home after a powerful tornado ripped through the neighborhood the day before. (Scott Olson/Getty Images) #

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Charles Stemm cleans off the face of his mother's gravestone at the Moore Cemetery on May 22. The two-mile-wide Category 5 tornado touched down May 20 killing at least 24 people and leaving behind extensive damage to homes and businesses. (Brett Deering/Getty Images) #

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A bathroom is all that remains standing in a tornado-destroyed home in Moore, Okla. (Rick Wilking/Reuters) #

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Charles Maloney tries to salvage papers from his tornado-destroyed home on Heather Lane in Moore, Okla. (Rick Wilking/Reuters) #

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Danielle Stephan holds boyfriend Thomas Layton as they pause between salvaging through the remains of a family member's home one day after a tornado devastated the town Moore, Okla., in the outskirts of Oklahoma City on May 21. Rescuers went building to building in search of victims and thousands of survivors were homeless on Tuesday after a massive tornado tore through the Oklahoma City suburb of Moore, wiping out whole blocks of homes and killing at least 24 people.(Adrees Latif/Reuters) #

Climbing Mount Everest ปีนยอดเขาเอฟเวอร์เรสต์

SOURCE : www.boston.com

Sixty years ago today New Zealand mountaineer Sir Edmund Hillary and Nepalese Sherpa Tenzing Norgay made the first confirmed ascent of the world's tallest peak which reaches 29,029 feet. Since then thousands of people have made the attempt, with many perishing. Just last week 80-year-old Japanese mountaineer Yuichiro Miura became the oldest person to reach the summit for the third time, although he said that he nearly died on the descent and that this would be his last time. The 1953 expedition that took Hillary and Norgay to the top ended with a stay of just 15 minutes, with Norgay leaving chocolates in the snow and Hillary leaving a cross that was given to him by Army Colonel John Hunt, the leader of the British expedition. -- Lloyd Young ( 37 photos total)

Tenzing Norgay, left, and Sir Edmund Hillary on their historic ascent of Mount Everest in 1953. (Associated Press)

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Sir Edmund Hillary and fellow climbers, on Mount Everest in 1953 during the first credited ascent to the mountain peak. (New York Times) #

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Sherpa Tenzing Norgay stands on the summit of Mount Everest May 29, 1953 after he and climbing partner Edmund Hillary became the first people to reach the highest point on Earth. (Edmund Hillary/Royal Geographical Society via Associated Press) #

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From left; Colonel John Hunt, Tenzing Norgay (better known as Sherpa Tensing), and Edmund Hillary make a jubilant return to Britain after becoming the first men to scale Mount Everest. (George W. Hales/Hulton Archive via Getty Images) #

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Sir Edmund Hillary, left, and Tenzing Norgay Sherpa smile after summiting the Mount Everest in 1953 in this undated handout photograph. Nepali Sherpa friends of Sir Hillary, who died on January 11, 2008, lit butter lamps and offered special Buddhist prayers in monasteries for the mountaineer, calling him a great philanthropist and friend of Nepal. Hillary, who scaled Mount Everest in 1953 along with Nepal's Tenzing Norgay Sherpa, spent much of his life afterwards helping Sherpa communities in Nepal, including projects to build hospitals and schools. (Norgay Archive via Reuters) #

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Media film the statues of Edmund Hillary, left, and Tenzing Norgay during a function to mark the 60th anniversary of successful ascent of Mount Everest, in Katmandu, Nepal, on May 29, 2013. Hillary and Norgay were the first people to set foot on the peak of Mount Everest on May 29, 1953. (Niranjan Shrestha/Associated Press) #

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Kancha Sherpa, a team member of the 1953 Mount Everest expedition that placed Tenzing Norgay and Edmund Hillary on the summit of the world's highest mountain, and Amelia Rose Hillary (2nd R), granddaughter of New Zealand mountaineer Edmund Hillary, waves to well-wishers from a horse-drawn carriage during a procession for Everest Summitteers during the Mount Everest Diamond Jubilee celebrations in Kathmandu on May 29, 2013. Nepal marked 60 years since the first ascent of Everest May 29, celebrating the summiteers whose success has bred an industry that many climbers now fear is ruining the world's highest peak. (Prakash Mathema/AFP/Getty Images) #

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Aerial photograph of Mount Everest (back-center) and Everest's West Shoulder with Nuptse (Right - 8848m) on May 15, 2003 on the Nepal - Tibet border. (Paula Bronstein/Getty Images)) #

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Buddhist prayer flags flutter in a strong wind blowing towards the snow capped peaks of Mount Everest, center, and Lhotse, right, near Tengboche village on the trail to Mount Everest in Nepal on May 14, 2003. A team of 12 mountaineers from Indian Army, Royal Nepalese Army and Nepalese sherpas scaled Lhotse Tuesday setting a record for the highest number of mountaineers to scale the technically difficult peak in a single day. (Gurinder Osan/Associated Press)) #

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Drinks, rice and a kind of flour is offered near the end of the Puja ceremony for Team Everest on April 7, 2003, at Everest Base Camp in Nepal. The Puja is a buddhist ceremony to bless the team and its equipment and to seek safe passage up the mountain. Buddhist prayer flags radiate from the center pole. (Erich Schlegel/The Dallas Morning News via Associated Press) #

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British mountaineering photographer Jonathan Griffith climbs in the upper reaches of Mount Everest on April 27, 2013. (AFP/Getty Images) #

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An aerial view the Mount Everest range some 140 km (87 miles) northeast of Kathmandu on Jan. 14, 2011. The government said it aims to double the number of foreign visitors who come to Nepal every year to one million in 2011. (Prakash Mathema/AFP/Getty Images) #

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Members of the E3 99 Everest Extreme Expedition negotiate a three ladder bridge over the Camp 1 crevasse at 19,500 feet on Mount Everest in Nepal, on May 13, 1999, testing vital sign monitors and gathering additional information on hypoxia and acclimatization. (Associated Press) #

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Mountaineers pass through the treacherous Khumbu Icefall on their way to Mount Everest near Everest Base camp, Nepal, on May 18, 2003. With the weather providing a safer window for summit attempts starting May 19, many teams, including the joint Indo-Nepalese army, Korean and Japanese have left for attempting to climb the world's highest peak. (Gurinder Osan/Associated Press) #

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A view of the Kumbhu icefall, the first hurdle in the ascent to Everest from base camp, as seen from Everest Base camp, in Nepal, on May 17, 2003. (Gurinder Osan/Associated Press) #

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Climbers from various countries descend Khumbu Icefall on their way back to Base Camo on May 22, 2013 after summiting Mount Everest . May is the most popular month for Everest climbs because of more favorable weather. Earlier this month, an 80-year-old Japanese man Yuichiro Miura became the oldest conqueror of Mount Everest and Raha Moharrak became the first woman from Saudi Arabia to scale the peak. (Pasang Geljen Sherpa/Associated Press) #

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An aerial photograph of Everest Base camp, a large tent city full of climbers at 18,000 ft. May 15, 2003 which sits at the foot of Mount Everest on the Nepal-Tibet border. A record 1,000 climbers plan assaults on the summit of Mount Everest to celebrate the 50-year anniversary of the first successful assault on the World's tallest mountain. (Paula Bronstein/Getty Images)) #

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Nepalese Sherpas climb Khumbu Icefall, on May 16, 2013 above Base Camp on their way to summit. May is the most popular month for Everest climbs because of more favorable weather. (Geljen Sherpa/Associated Press) #

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A golden glow envelopes as the sun sets on the worlds highest mountain, center, seen from Kalapathar, on the trail to Everest, Nepal, on Nov. 15, 1983. Hundreds and thousands of mountaineers and mountain lovers have gathered in Katmandu to take part in various celebrations to mark the 50th anniversary of the first ascent of Everest by Edmund Hilary and Tenzing Norgey on May 29, 1953. (Bikas Das/Associated Press) #

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Japanese Yuichiro Miura, 80-year-old professional skier, alpinist, as he advances amid an icefall to the advance base camp C2 on the route to the world's highest peak of Mount Everest, Nepal, on May 16, 2013. (European Pressphoto Agency) #

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80-year-old Japanese extreme skier Yuichiro Miura stands atop the summit of Mount Everest as he becomes the oldest person to climb the world's tallest mountain May 23, 2013. Miura, who also conquered the peak when he was 70 and 75, reached the summit at 9:05 a.m. local time, according to a Nepalese mountaineering official and Miura's Tokyo-based support team. (MIURA DOLPHINS Co., Ltd via Associated Press) #

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Japanese mountain climber Yuichiro Miura, 80, shows a victory sign upon his arrival at the airport after climbing Mount Everest, in Kathmandu May 26, 2013. Miura, who has had four heart surgeries, reached the top of Mount Everest on Thursday becoming the oldest person to conquer the world's highest mountain. Miura, who first climbed Everest in 2003 and repeated the feat five years later, takes the oldest climber record from Nepal's Min Bahadur Sherchan, who reached the summit at the age of 76 in 2008. (Navesh Chitrakar/Reuters) #

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Two people (bottom left) stand next to their tent as they camp at the base of the earth's highest peak, Mount Everest, in the Tibet Autonomous Region, the People's Republic of China, on Oct.13, 2011. Tibet is a vast land of harsh, arid, brown plateaus and majestic mountain ranges. Living in the thin air of this high altitude desert are many nomads. Religion is an integral part of life for Tibetans, and most partake in religious pilgrimages of hundreds of kilometers to visit the region's monasteries and sacred sites. (Barbara Walton/European Pressphoto Agency) #

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Members of Mount Everest (Mt. Qomolangma) expedition team inch their way up a slope of the mountain on May 19, 2005. (Suolang Luobu/Associated Press) #

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In this image released by mountain guide Adrian Ballinger of Alpenglow Expeditions and taken May 18, 2013, climbers make their way to the summit of Mount Everest, in the Khumbu region of the Nepal Himalayas. Nepal celebrated the 60th anniversary of the conquest of Mount Everest on Wednesday, May 29, 2013, by honoring climbers who followed in the footsteps of Edmund Hillary and Tenzing Norgay. (Adrian Ballinger/Alpenglow Expeditions via Associated Press) #

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Mount Everest (top), or Sagarmatha, the highest peak in the world with an altitude of 8,848 meters is seen in this aerial view next to the 6,812 meters (22,349 feet) high Mount Ama Dablam (bottom) on April 22, 2007. Climate experts agreed on a U.N. report on May 4, 2007 that said fighting global warming is affordable and the technology available to slow the growth in greenhouse gas emissions and stave off climate chaos, a senior delegate said. (Desmond Boylan/Reuters) #

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Climbers make their way to the summit of Mount Everest on May 18, 2013, in the Khumbu region of the Nepal Himalayas. Nepal celebrated the 60th anniversary of the conquest of Mount Everest on Wednesday, May 29, 2013. (Adrian Ballinger/Alpenglow Expeditions via Associated Press) #

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In a May 19, 2009 photograph, unidentified mountaineers descend Mount Everest. A group of top Nepalese climbers are planning a high-risk expedition to clean up Everest, saying decades of mountaineering have taken their toll on the world's highest peak. "Everest is losing her beauty," seven times Everest summiteer Namgyal Sherpa, 30, told AFP. "The top of the mountain is now littered with oxygen bottles, old prayer flags, ropes, and old tents. At least two dead bodies have been lying there for years now". (AFP/Getty Images) #

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Tents glow in the twilight as clouds cover Everest Base Camp in Nepal on May 22, 2003. Many teams have rescheduled their summit attempt due to bad weather, even as some managed to reach the summit of Mount Everest from the south side, first climbed this season by the Indian-Nepalese army team early Thursday. (Gurinder Osan/Associated Press) #

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Climbers navigate the knife-edge ridge just below the Hillary Step on May 18, 2013 during their way to the summit of Mount Everest, in the Khumbu region of the Nepal Himalayas. Sixty years ago Wednesday, Sir Edmund Hillary and climbing partner Tenzing Norgay were the first to set foot on the summit of Mount Everest, the highest point on earth on May 29, 1953. (Adrian Ballinger/ALPENGLOW EXPEDITIONS, via Associated Press) #

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Arunima Sinha poses with the Indian flag on Mount Everest. The twenty-six year old Sinha, from the northern state of Uttar Pradesh, who lost her leg after she was thrown from a moving train two years ago, became the first female amputee to climb Everest on May 21. (Arunima Sinha/AFP/Getty Images) #

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13-year-old Jordan Romero, right, poses for photos with a Sherpa guide on the summit of Mount Everest on May 22, 2010. Jordan became the youngest climber to reach the top of Mount Everest after climbing it from the Chinese side accompanied by a team that included his father, his stepmother and three Sherpa guides. (Team Romero via Associated Press) #

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Two Japanese climbers, in blue, rest on top of Mount Everest, surrounded by Tibetan prayer flags on May 20, 2013. (Pasang Geljen Sherpa/Associated Press) #

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Nepalese Mountaineer Apa Sherpa with Mountain gear stands atop Mount Everest, Nepal, on May 22, 2010 while breaking his own record. The Nepalese conquered the 8,848-metre high Mount Everest for the 20th time on May 22, breaking his own previous world record in a climb he dedicated to environmental awareness. (Apa Sherpa via European Pressphoto Agency) #

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Nepal marked 60 years since the first ascent of Everest May 29, celebrating the summiteers whose success has bred an industry that many climbers now fear is ruining the world's highest peak. (Tshering Sherpa/AFP/Getty Images) #

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Mount Everest seen from above Everest Base camp, Nepal on May 26, 2003. Sir Edmund Hillary's son, Peter Hillary, is scheduled to hold a prayer session and ritual mask dance at the monastery today to commemorate 50 years of his father's and Tenzing Norgay's climb to Mount Everest. (Gurinder Osan/Associated Press) #

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Tibetan Buddhist prayer flags are seen on the summit of Mount Everest on May 18, 2013 in the Khumbu region of the Nepal Himalayas. Nepal celebrated the 60th anniversary of the conquest of Mount Everest on Wednesday, May 29, 2013, by honoring climbers who followed in the footsteps of Edmund Hillary and Tenzing Norgay. (ALPENGLOW EXPEDITIONS via Associated Press) #