canada
United States.
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 only country to ever use nuclear weapons in war is the United States with the two bombs they dropped on Japan. No other country has ever actually used a nuclear weapon.
If you mean used it in an act of warfare, as opposed to a test, the only country to do so has been the USA (Hiroshima and Nagasaki, 1945)
August 6, 1945
If Russia, Afghanistan or any country tries to attack us we can use a nuclear weapon and send them back home. The countries with nuclear weapons won't attack us with those weapons because they know that if they attack with them, we will attack them back ans nobody wants to be attacked.
Nuclear weapons provide protection against war. With the possession of a nuclear weapon, enemy states will be hesitant to attack due to Mutual Assured Destruction (M.A.D.), the belief that if a country attacks another state with a nuclear weapon, the targeted state with fire with a counter attack, assuring both nations will be significantly damaged.
canada
iraq
Iran
The country that did not sign the Central Asian-Nuclear-weapon- free-zone treaty is Afghanistan.
It was a weapon of mass destruction designed to attack an area target.
United States.
The meaning of the word nuclear weapon, is a weapon that has a nuclear warhead on it.
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.
Number of nuclear weapons by country: Country # of nuclear weapons USA 10'300 Russia 16'000 China 410 France 350