At the Trinity site in the NE corner of what is now Whitesands Missile Range, about equidistant from Socorro, NM and Alamogordo, NM.
Currently, nine states possess nuclear weapons.United States - Tested its first nuclear weapon in 1945Russia - Tested its first nuclear weapon in 1949United Kingdom - Tested its first weapon in 1952France - Tested its first weapon in 1960China - Tested its first weapon in 1964India - Tested its first weapon in 1974Pakistan - Tested its first weapon in 1998Israel - Acquired weapons sometime between 1967-1971North Korea - Tested its first weapon in 2009Four states have ended their nuclear programsSouth Africa - de-nuclearized in 1991Belarus, Ukraine, and Kazakhstan - Returned nuclear weapons to Russia in mid-1990s.Nuclear Aspirants, but no nuclear program or weaponsGermany, Canada, Libya, Japan, Argentina, Syria. Sweden, Egypt, South Korea, Switzerland, Iraq, TaiwanFuture nuclear states?IranSee, Peter Beckman et. al, Nuclear Weapons, Nuclear States, and Terrorism (2007), 41.
The United Kingdom tested its first nuclear weapon on 3 October 1952.
The atomic bomb was the first nuclear weapon ever made during World war two and it was the first weapon that have been tested before Hiroshima was under attack.
The first Soviet nuclear weapon was tested in 1949. They have never used one in combat.
USSR
they designed them, built the infrastructure and tested them.
The first implosion-style nuclear device was tested on July 16, 1945, as part of the Trinity test in New Mexico, USA. This test marked the first successful detonation of a nuclear weapon.
North Korea.
The first Nuclear weapon was created by a team of American Scientist's, known as the Manhattan project. It was first tested and used in 1945, not long before we used them on Japan.
The biggest nuclear weapon ever tested was the Tsar Bomba, a hydrogen bomb detonated by the Soviet Union in 1961. It had a yield of 50 megatons, making it the most powerful nuclear weapon ever detonated.
The first hydrogen bomb tested by the US was codenamed "Mike" and tested in the Marshall Islands.
The Democratic People's Republic of Korea (known colloquially as North Korea) announced and tested its first nuclear weapons test in 2006. On October 3, 2006, North Korea announced that it planned to test a nuclear weapon. The weapon was tested on October 9th. The yield was approximated to be about 0.48 kilotons (480 tons), and is widely believed to have been a "fizzle."