[img]http://z.about.com/d/inventors/1/0/Z/9/nuke2.jpg[/img] [img]http://upload.wikimedia.org/wikipedia/commons/c/cf/HAtomOrbitals.png[/img] [img]http://upload.wikimedia.org/wikipedia/commons/thumb/c/cb/Fission_bomb_assembly_methods.svg/250px-Fission_bomb_assembly_methods.svg.png[/img] [small][font=times] Jul 16 1945 Trinity 19 United States USA First fission weapon test Aug 6 1945 Little Boy 15 United States USA Bombing of Hiroshima, Japan Aug 9 1945 Fat Man 21 United States USA Bombing of Nagasaki, Japan Aug 29 1949 Joe 1 22 Union of Soviet Socialist Republics USSR First fission weapon test by the USSR Oct 3 1952 Hurricane 25 United Kingdom UK First fission weapon test by the UK Nov 1 1952 Ivy Mike 10,200 United States USA First "staged" thermonuclear weapon test (not deployable) Aug 12 1953 Joe 4 400 Union of Soviet Socialist Republics USSR First fusion weapon test by the USSR (not "staged", but deployable) Mar 1 1954 Castle Bravo 15,000 United States USA First deployable "staged" thermonuclear weapon; fallout accident Nov 22 1955 RDS-37 1,600 Union of Soviet Socialist Republics USSR First "staged" thermonuclear weapon test by the USSR (deployable) Nov 8 1957 Grapple X 1,800 United Kingdom UK First (successful) "staged" thermonuclear weapon test by the UK Feb 13 1960 Gerboise Bleue 60 France France First fission weapon test by France Oct 31 1961 Tsar Bomba 50,000 Union of Soviet Socialist Republics USSR Largest thermonuclear weapon ever tested Oct 16 1964 596 22 People's Republic of China China First fission weapon test by China Jun 17 1967 Test No. 6 3,300 People's Republic of China China First "staged" thermonuclear weapon test by China Aug 24 1968 Canopus 2,600 France France First "staged" thermonuclear test by France May 18 1974 Smiling Buddha 12 India India First fission nuclear explosive test by India May 11 1998 Shakti I 43 India India First potential fusion/boosted weapon test by India (exact yields disputed, between 25kt and 45kt) May 13 1998 Shakti II 12 India India First fission "weapon" test by India May 28 1998 Chagai-I ~9 Pakistan Pakistan First fission weapon test by Pakistan Oct 9 2006 Hwadae-ri ~1 North Korea North Korea First fission device tested by North Korea (unconfirmed)[/font][/small]