Today in Labor History March 1, 1954: The U.S. detonated Castle Bravo, a 15-megaton hydrogen bomb on Bikini Atoll. It caused the worst radioactive contamination ever by the U.S. However, this occurred after years of nuclear testing and contamination of the islands and waters around them. The U.S. detonated 23 nuclear devices on the islands from 1946 to 1958. They blew up the bombs on the reef, in the sea, in the air and underwater. They relocated islanders several times, each time to supposedly safe islands. But they neglected to provide sufficient food and water, causing starvation. When the islanders tried to catch fish to eat, or grow their own crops, they were so contaminated from radioactive fallout, that it poisoned all who ate it. Women started having miscarriages and giving birth to babies with abnormalities.