1945 July 19

1945 July 19

J. Robert Oppenheimer suggests to General Leslie Groves that the U-235 from Little Boy be reworked into uranium/plutonium composite cores for making more implosion bombs (4 implosion bombs could be made from Little Boy's pit). Groves rejects the idea since it would delay combat use.

Date Range: 
1945CE Jul 19th