http://www.metacafe.com/watch/365652/hiroshima_atomic_bomb_reenactment/
(Reenactment of atomic bomb on Hiroshima video)

http://www.youtube.com/watch?v=NF4LQaWJRDg
(Hiroshima: dropping the bomb video)

http://www.c-spanvideo.org/program/66946-1
(Atomic bomb discussion and implementation video)