Startling revelations have come to light that two U.S. nuclear bombs were detonated above Canadian soil in the 1950s when the military airplanes carrying the bombs experienced malfunctions.

The bombs were both disarmed when they exploded, but the detonations still released about 90 kilograms of radioactive uranium into the atmosphere, says a Canadian researcher, John Clearwater.

One exploded in the Gaspe region of Quebec, where residents have complained for years about higher-than-normal cancer rates.

Previously, the cancer rates were blamed by some on pesticides used by Hydro-Quebec and other companies.

The other bomb exploded just off Vancouver Island.