At 3:35 a.m. on July 6, 1942, four P-40 Kittyhawk fighters scrambled out of the air station at Mont-Joli, Que., and went U-boat hunting. One of them never returned.Near the end of their two-hour patrol, Kittyhawk AK915, piloted by Squadron Leader Jacques Chevrier, went down in up to 70 metres of water, less than five kilometres off Cap-Chat, Que. The wreck was never found, a cause was never determined, and Chevrier’s remains were not recovered. Now, 80 years after his disappearance, members of the Canadian Aviation Historical Society are trying to pinpoint the exact location of Chevrier’s plane, find out why it crashed, and persuade authorities to award the Battle of Britain veteran the medals the government acknowledges he’s earned. “We’re not going to find a perfectly preserved air...