A man dives into a polluted section of the River Yamuna to scavenge for ornaments and coins left by Hindus at the river bank in New Delhi, India, on March 22. On World Water Day, officials say factories are ignoring regulations and dumping untreated sewage and industrial pollution into the river that gives much of the capital its drinking water. Gurinder Osan/AP
Avery Smith of White River Junction, Vt., makes her first attempt at pond skimming during the fourth annual end of season Junk Show at Whaleback Mountain in Enfield, NH, on March 21. Jason Johns/Valley News/AP
A five-week-old Chinchilla rabbit looks out of a wooden box at a rabbit farm in Moosburg, Germany, on Monday. The rabbits at the farm are bred to compete in shows. Michaela Rehle/Reuters
Cadets pose for a photograph during a Special Police Force parade in the Swat Valley region of Pakistan's Northwest Frontier province. Authorities say security has improved since a military offensive nearly a year ago cleared out militants from Swat. Police remain vulnerable to suicide attacks and residents fear the Taliban will return if the military leaves. Akhtar Soomro/Reuters
People raise their hands to welcome spring during the equinox at the bottom of a pyramid from the Olmec period in Comalcalco, Mexico, on March 21. Luis Lopez/Reuters
St. Louis Cardinals hitting coach Mark McGwire signs autographs before a spring training baseball game against the Atlanta Braves on Monday in Kissimmee, Fla. Charlie Riedel/AP
Tourists wear masks as they visit Tiananmen Square during a sandstorm in Beijing, China, on March 22. Cities across China are being battered by spring sandstorms, forcing residents to cover their faces to protect themselves from the flying dust. Gemunu Amarasinghe/AP
A woman wears a face mask depicting a cartoon character as she walks along a street during the sandstorm in Beijing, China, on March 22. David Gray/Reuters
US President Barack Obama and Vice President Joe Biden walk down the Cross Hall of the White House on Washington on March 21 after Obama made a statement about the healthcare reform bill passing in the House of Representatives on Sunday. Jason Reed/Reuters
Members of the House of Representatives applaud House Speaker Nancy Pelosi (D) of California after she signed the Senate Health Reform Bill on Monday, on Capitol Hill in Washington. Manuel Balce Ceneta/AP
To mark World Water Day in Buenos Aires, Argentina, artist Nicolas Garcia Uriburu (l.) and members of Greenpeace dye the Riachuelo River, Argentina's most polluted basin, green during a demonstration on Monday. The activists' flag reads 'Riachuelo: 200 years of pollution.' Marcos Brindicci/Reuters
An attack on an army checkpoint in the Sinai Peninsula killed 30 Egyptian troops on Friday, making it the deadliest single attack in decades on military.
ByAshraf Sweilam and Maggie Michael, Associated Press
A coordinated assault on an army checkpoint in the Sinai Peninsula killed 30 Egyptian troops on Friday, making it the deadliest single attack in decades on the military, which has been struggling to stem a wave of violence by Islamic extremists since the overthrow of Islamist President Mohamed Morsi.