1st atomic bomb dropped on Hiroshima. Culmination of secret US Manhattan project. Brought Second World War to an end
1 of 9
1946
UN Baruch plan as attempt to control atomic weaponry fails (US to share knowledge of nuclear technology but no other countries allowed to develop atomic bomb)
2 of 9
1949
USSR detonate atomic bomb
3 of 9
1952
USA detonate 1st hydrogen bomb. 1000 times more destructive than atomic bomb
4 of 9
1953
USSR detonate lithium bomb - more easily deployed than hydrogen bomb as didn't need refrigeration
5 of 9
1954
USA detonate lithium bomb
6 of 9
1955
USA develops 1st intercontinental bomber: B52 Stratofortress
7 of 9
1956
USSR develops own intercontinental bomber - TU20 Bear
UN Baruch plan as attempt to control atomic weaponry fails (US to share knowledge of nuclear technology but no other countries allowed to develop atomic bomb)
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