Officials say an Afghan military pilot opened fire on NATO troops in Kabul on Wednesday, killing eight coalition soldiers and an American contractor. It was the deadliest such incident since the war began in 2001. The Afghan Defense Ministry said the veteran pilot shot and killed coalition troops during an argument inside an Afghan air force meeting room at the Kabul airport. The pilot was killed in subsequent gunfire. The Pentagon identified all nine victims as Americans. Five members of the Afghan security forces were also wounded. NATO condemned the attack as the Afghan President Hamid Karzai who ordered an investigation.