every above ground, surface, or shallow subsurface nuclear test produced fallout. Look up the number of such tests performed and you have your answer.
The book Under the Cloud there is a fallout path map for every Nevada Test Site shot that generated fallout. We did not miss any of the continental 48 states and even left some in Canada & Mexico.
Hard to say. Many countries make nuclear weapons behind other countries backs. Some countries are not announcing when they complete testing or development for nuclear warheads, so the world may never know.
Nuclear weapon, nuclear (atomic) power stations. Also the Sun works on nuclear reactions.
North Korea
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.
Only two nuclear weapons have been used in combat, both quite primitive designs to the weapons that are deployed today. The weapon with the most quantities in the current active US nuclear stockpile is the W76/Mk-4 warhead.
You can count them yourself in the related link on The Nuclear Weapon ArchiveA Guide to Nuclear Weapons
In 1954, following the US explosion of a large thermonuclear device in the South Pacific, Prime Minister Nehru of India led the first international call for a comprehensive ban on nuclear testing. It took until 10 September 1996 for the General Assembly of the United Nations to adopt the Comprehensive Nuclear Test Ban Treaty (CTBT). As at the end of April 1997, it had been signed by 142 states including the five nuclear-weapon states.
There have been no nuclear weapons launched recently as of August 2013. If a nuclear weapon had been launched, governments of the world would react immediately to protect themselves.
Besides Hiroshima and Nagasaki in 1945 at the end of World War 2, no nuclear weapon has ever been used with the intention of causing death, or in any other capacity what-so-ever, except for testing purposes in remote, unpopulated test sites.
President Donald Trump!!!!
{| |- | Yes, the US is the only country to have used an atomic weapon in war. Two of them were dropped on Japan in the final days of World War 2. Since then, the only detonations have been in testing, mostly underground. |}
Been really busy, haven't gotten around to it yet. Besides, why should I eliminate them when they are yours?