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The Balance of Terror

The thermonuclear bomb

The Mémorial has a copy of a Mark bomb, from the same series as those used to bomb Hiroshima and Nagasaki.

This was a plutonium bomb, a type Mark 28 H bomb. “Little Boy”, dropped over Hiroshima, was numbered “Mark 1”. “Fat Man”, which destroyed Nagasaki, was “Mark 2”. The “Mark 28” bomb therefore continued the series. Some 4,500 of them were first made in 1958, making it the most widely produced atomic bomb during the Cold War, between 1958 and 1991. This particular «Mark 28» version dates from 1962.