The United States became the only country to have used nuclear weapons in warfare when they dropped atomic bombs on Japan during World War II.
The United States emerged from as a global superpower , the first country to develop nuclear weapons , the only country to use them in warfare , and a permanent member of the United Nations Security Council .	superpower	superpower	first country to develop nuclear weapons	Nuclear weapons and the United States	use them	Atomic bombings of Hiroshima and Nagasaki	permanent member	Permanent members of the United Nations Security Council	United Nations Security Council	United Nations Security Council	United Nations	United Nations
At the order of President Harry S. Truman during the final stage of World War II , the United States dropped nuclear weapons on the Japanese cities of Hiroshima and Nagasaki on August 6 and 9 , 1945 , respectively .	World War II	World War II	Hiroshima	Hiroshima	Nagasaki	Nagasaki	Harry S. Truman	Harry S. Truman
