The pacific proving grounds encompassed both Bikini and Eniwetok atolls, rings of multiple coral islands surrounding a central lagoon. atolls develop from slowly subsiding dead volcanos around which coral reefs grow in rings, eventually forming islands.
several:
The BIG shots were outside the US; on Bikini and Eniwetok atolls.
In 1957 studies were done to look for additional sites.
far away from large populations
Which President? US or UK. Since US is the first country to use nuclear weapons, then I assume that you are asking who was the US president during world war two while nuclear testing? Answer: Truman.
The US was the first to start testing nuclear weapons
The Bikini atoll was used for nuclear weapons testing.
No, there is an international agreement on banning testing, which the US observes
The US performed the first nuclear weapon test on July 16, 1945.
The French conducted nuclear testing in the Tuamotu islands, on the atoll of Mururoa. The US conducted nuclear testing on the atoll of Bikini in the Marchall islands.
After the natives were convinced to move out, it was a secure area for nuclear testing. Access to the islands were controlled to hide government secrets and it was far from populated areas.
LTBT
The accumulation of nuclear arms shaped the cold war in many ways. When the us first started building and testing nuclear arms, the soviet union was furious and immediately began testing. Then the soviets successfully test their nuclear weapon. The u.s found this out out because a us spy plane found traces of nuclear material in the air.
Testing the Hydrogen bomb
Although US agreed several arms agreements banning use of nuclear weapons, USA DOES use nuclear weapons and in fact, US is the ONLY nation to have used nuclear weapons in war.