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Description:03 19 23 00 Canada. 100 tons of TNT, explosives are stored in the hangar. Experiment. Engineer handles instrument panel, control panel, presses on buttons, looks at monitors. Close-up on cameraman who films the test of the explosion. Explosion, which look like an atomic explosion, formation of a black mushroom in the sky. Formation of a ring of smoke in the sky, close-up on men who look at.