When and where were nuclear bombs tested?

Answer 1

• The US tested nuclear devices in the Trinity test site in NM, Bikini atoll in the Marshal islands, Eniwetok atoll in the Marshal islands, underwater offshore Mexico in international waters south of San Diego CA, the Nevada test site north of Las Vegas NV, in space, and for project Plowshare (peaceful uses of nuclear explosives) in about half a dozen other states.
• The USSR tested nuclear devices at 2 or 3 sites in Siberia and its largest fusion bomb tests were on the arctic island of Novaya Zemlya.
• The UK tested nuclear devices in Australia.
• France tested early nuclear devices in the Sahara desert while it still had colonies there, since then I'm not sure.

Answer 2

Nuclear bomb testing took place primarily during the mid-20th century, with the first test conducted on July 16, 1945, in Alamogordo, New Mexico, USA. Subsequent tests were carried out in various locations, including the Pacific Ocean, Nevada, and Kazakhstan. The last nuclear test conducted by a nuclear-armed state was by North Korea in 2017.