The exact number is highly classified. It would be classified as Top Secret information. Both sides kept such things secret, while making it obvious to the other that the number is substantial.
The nuclear arms reduction treaties such as START do not restrict the number of weapons, only the number of vehicles (missiles, bombers) that can deliver them to their target. Many older nuclear weapons and missiles have been removed from service under various treaties.
The United States does not give or sell nuclear weapons to any country. The United States has stationed nuclear weapons on the territory of many countries, but always retained full control of them.
Many countries have nuclear weapons today including the United States. China, North Korea, South Korea, and Japan also have nuclear weapons.
Currently 9 countries possess nuclear weapons; The United States, United Kingdom, France, Russia, China, Israel, India, Pakistan and North Korea.
Yes, it is dangerous for the United States and the rest of the world because North Korea possesses nuclear weapons. However,we are doing many things to keep them in check.
While many countries have exploded test weapons, only the United States has ever used Nuclear weapons against an adversary. Two bombs were dropped on two cities in Japan Hiroshima and Nagasaki in 1945, to bring WWII to an end.
Only nine countries have confirmed nuclear weapons: United States, Russia (and several former USSR countries), United Kingdom, France, China, India, Pakistan, North Korea, and Israel. All of these have conducted known nuclear tests except for Israel. All other countries of the world do not have known nuclear weapons. To see a breakdown of how many weapons each of these countries is believed to have, see the "related links" below.
China is not a nuclear free zone. They have many nuclear weapons. Though China has a nuclear policy which states that they are not allowed to produce,fire, or give away these weapons.
Nobody. There have only been two nuclear weapons ever used in a time of war. Both were dropped on Japan at the end of WWII by the United States military. Many other countries have developed and tested their own nuclear weapons, but none have been used to kill.
The UN tried to limit nuclear weapons in many ways. For example, the UN simply wanted all nations to disarm itself with all WMD (Weapons of Mass Destruction), this includes Nuclear Weapons. Also when certain countries like Iran and Korea starts a nuclear program, the UN tries to make sure that none of it is used to make Nuclear Weapons.
104, see www.nrc.gov
there are many harmful causes of nuclear weapons because whole hiroshima was destroyed of it
Currently, 100 nuclear power plants are operating the United States per the statistics of the International Atomic Energy Agency (IAEA) as of April 2004.