The slain officer, Maj. Gen. Harold J. Greene, was the highest-ranking member of the NATO-led coalition killed in the Afghanistan war, and his death punctuated the problems vexing the Americans as they try to wind down the 13-year-old conflict, contending with a political crisis that has threatened to splinter the Afghan government and leave it unable to fend off the Taliban.

The general was among a group of senior American and Afghan officers making a routine visit to Afghanistan's premier military academy on the outskirts of Kabul when an Afghan soldier sprayed the officers with bullets from the window of a nearby building, hitting at least 15 before he was killed.