Chronology: Friendly fire fallout

FROM CANADIAN PRESS

Some of the key developments in the accidental bombing of Canadian soldiers in Afghanistan, in which four were killed and eight injured:

April 18, 2002:
U.S. pilots Maj. Harry Schmidt and Maj. William Umbach fly over Tarnak Farm range near Kandahar. They see gunfire and believe it is hostile action. Schmidt drops a 225-kilogram bomb on the Canadians who are carrying live-fire exercise. Accident happened in darkness at 1:55 a.m. local time (it was still April 17 in Canada because of the time difference).