As of Aug. 28, 2014, the United States is in possession of approximately 7,300 units of nuclear weapons. This number places it second only to Russia, who has approximately 8,000 nuclear weapons in its arsenal. At its peak in 1967, the United States possessed 31,255 nuclear weapons.
The largest nuclear weapon in the United States stockpile is the B83 nuclear weapon, which has a yield of 1.2 megatons. Since the beginning of the United States nuclear weapons program, around 11 nuclear bombs have been lost due to accidents. During the Cold War, the United States stationed approximately 950 nuclear weapons in South Korea.