THIS IS A VIDEO CLIP OF THE BIGGEST AMERICAN NUCLEAR WEAPON TEST, THE 14.8 MT CASTLE-BRAVO SHOT FIRED ON 1 MARCH 1954 ON THE REEF NEAR NAMU ISLAND, BIKINI ATOLL.

IN THE VIDEO THE BLAST HAS PUSHED AIR OUT WHICH CAN BE SEEN RETURNING BY THE MOTION OF THE WILSON CLOUD (THE CLOUD OF WATER DROPLETS WHICH CONDENSE IN THE LOW PRESSURE AIR FOLLOWING THE BLAST WAVE IN THE 80% HUMIDITY TROPICAL ATMOSPHERE) WHICH MOVES INWARDS TOWARDS GROUND ZERO NEAR THE END OF THE CLIP.