Creation of the Atomic Bomb By Moises Merlos Aug 2, 1936 Albert Einstien writes to president FDR. Dec 6, 1941 FDR gives $2 billion to start building the Atomic Bomb Sep 23, 1942 Colonel Leslie Groves is put in charge of the Manhattan Project. Dec 2, 1942 Enrico Fermi and his team produce the world's first nuclear fission reaction. Feb 23, 1943 Remodeling of the B-29 to deliver the Atomic Bomb Jul 16, 1945 The world's first atomic detonation takes place in the 'Trinity Test' at Alamogordo, New Mexico Jul 21, 1945 President Truman orders atomic bombs to be used. Aug 6, 1945 Little Boy explodes over Hiroshima killing over 100,000 people