add nonfissionable material to (fissionable material) so as to make unsuitable for use in an atomic bomb v
later used temporarily by the United States to test atomic bombs n World War II (February 1944)
United States general who served as military director of the atomic bomb project (1896-1970)
on August 6, 1945 Hiroshima was almost completely destroyed by the first atomic bomb dropped on a populated area
on August 9, 1945 Nagasaki became the second populated area to receive an atomic bomb
atomic bombardment
[电] 原子冲击
