Countries with Nuclear Weapons Capability

Acknowledged: Britain, China, France, India, Pakistan, Russia, United States

Unacknowledged: Israel (But I'd put all my money saying they do...)

Seeking: Iran, North Korea (*1)

Abandoned: South Africa - Constructed but then voluntarily dismantled six uranium bombs. Belarus, Kazakhstan, Ukraine - When Soviet Union broke up, these former states possessed nuclear warheads that they have since given up.

*1. In Dec. 2002, North Korea revealed that it had violated its 1994 agreement to freeze its nuclear weapons program and has been developing a nuclear bomb. On April 24, 2003, North Korea announced it possessed a nuclear bomb but this claim has not been verified.

Source: U.S. State Department and Time magazine.