The U.S. military on Friday admitted that a drone strike it carried out last month in Afghanistan's capital Kabul killed as many as 10 civilians, including seven children, and called the attack a "tragic mistake."The Aug. 29 strike, which destroyed a vehicle initially believed to have been loaded with explosives, took place in the final stages of the U.S. troop withdrawal from Afghanistan. It was intended to stop an "imminent" threat to the international airport in Kabul, where troops were evacuating civilians.But Marine Corps Gen. Kenneth McKenzie, head of the U.S. Central Command, told a …READ FULL ARTICLE