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Published May 31, 2011, 12:00 AM

First US hydrogen bomb

The first U.S. hydrogen bomb, code-named Bravo, was detonated on March 1, 1954, on the Bikini Atoll in the Pacific Ocean. Its 15-megaton yield was the most powerful nuclear weapon ever exploded by the United States. Courtesy U.S. Department of Energy
Read the article: Thunder at dawn: Area veteran witnessed largest US nuclear bomb test ever