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An Afghan soldier stands guard as a helicopter flies low over the scene of a suicide attack on the U.S.-led provincial reconstruction team (PRT) compound in the Behsood district of Jalalabad, east of Kabul Afghanistan, on Sunday, April 15, 2012. The Taliban launched a series of coordinated attacks on at least seven sites across the Afghan capital on Sunday, targeting NATO headquarters, the parliament and diplomatic residences. Militants also launched near-simultaneous assaults in three other eastern cities. (AP Phot/Rahmat Gul)

Afghan attack kills US troops

An Afghan soldier turned his gun on American troops

at a checkpoint in the country's east, killing two Americans and at

least two fellow members of Afghanistan's army in a shooting that marked

both the continuance of a disturbing trend of insider attacks and the 2,000th U.S. troop death in the long-running war. (AP)