On March 1, 1954, John Anjain was awakened by a deafening boom. When he ran outside of his house to investigate, he was greeted by a kaleidoscope sky: brilliant colors filled the heavens. It was early morning on Rongelap Atoll, a ring of islands in the vast sea between Hawai’i and Guam. The largest nuclear weapon that had ever been tested by the U.S. military was now raining radioactive powder down on his island.