Landau led a team of mathematicians supporting Soviet atomic and hydrogen bomb development. The twenty-fourth charge related to his opposition to the hydrogen bomb. Kurchatov contributed some of the calculations necessary for the Soviet Union's first hydrogen bomb. Implicit in the creation of a hydrogen bomb was that it would be tested. He concludes that Godzilla has been disturbed by underwater hydrogen bomb testing. A bomber carrying a hydrogen bomb crashes into Japanese waters. Lithium deuteride was the fusion fuel of choice in early versions of the hydrogen bomb. They provided the Soviets with detailed designs of the implosion bomb and the hydrogen bomb. At that time, very few people knew anything about hydrogen bomb design. The ENIAC's first use was in calculations for the hydrogen bomb. In 1950 there was no practical design for a hydrogen bomb. In 1977, Juliet detonates the fission core taken from the hydrogen bomb. The Soviet Union set up a group to work on the hydrogen bomb. Penney believed that Britain could not afford to develop a hydrogen bomb. They stayed on, though their views on the hydrogen bomb were well known.