 Uftal Air Base has between 10 and 20 U.S. hydrogen bombs and is notorious because German pilots flying German jets rehearse plans to detonate the U.S. H-bombs against areas in Russia. I say areas rather than targets because these U.S. H-bombs, known as B-61s, are between 3 and 11 times deadlier than the Hiroshima bomb, which burned 4.4 square miles and killed 140,000 people.