On July 8, 1965, Canadian Pacific Flight 21 crashed near 100 Mile House in British Columbia, resulting in the deaths of all 52 passengers and crew onboard the Douglas DC-6B aircraft.
The flight was a domestic scheduled flight from Vancouver to Whitehorse in the Yukon, with several stops en route.
Three MayDay calls from the stricken aircraft were heard by air traffic controllers in Vancouver after it passed Ashcroft, British Columbia. An explosion had occurred on the aircraft, resulting in the tail separating from the fuselage. The aircraft spiralled out of control and crashed in a densely wooded area. An inquest into the crash would later determine that a bomb exploded on the aircraft, but the source and motive were never uncovered.