We are allies, right?
A sad fact about Canadian involvement in the Afghanistan war. The first Canadian casualties of this war were from an American pilot bombing a Canadian training exercise. Private Mark Anthony Graham was an Olympic athlete, he died 4th of September 2006 by accidental friendly fire attack by US aircraft A-10 Thunderbolt II. This attack damaged more that 30 other Canadians as well.
A total of 158 Canadian Forces personnel have been killed in the war in Afghanistan since 2002 (Source).