10 - Little Boy
The little boy was the code name of the atomic warhead used by the USA against Japan (Hiroshima). The Mechanism was free fall drop. B-29 bomber was used in the attack. The Blast Yielded approximately about 20 kilo tons of energy. At one mile (1.6 km), the force of the blast wave was 5 psi, with enough duration to implode houses and reduce them to kindling. Approximately 66,000 people were killed as a direct result of the Hiroshima blast, and 69,000 were injured to varying degrees.
9 - Fat Man
The atomic bomb which was dropped on the Japanese city of Nagasaki on August 9, 1945, it was the second nuclear weapon used in a war. It was 10 times more efficient then the little boy dropped on Hiroshima. The mechanism was same that is free fall drop mechanism delivered by a B-29 Bockscar piloted by Maj. Charles Sweeney. Blast yield was approximately 21-22 kT.
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