Yahoo! News - Al-Qaida No. 2: We Have Briefcase Nukes
SYDNEY, Australia - Osama bin Laden (news - web sites)'s terror network claims to have bought ready-made nuclear weapons on the black market in central Asia, the biographer of al-Qaida's No. 2 leader was quoted as telling an Australian television station.

In an interview scheduled to be televised on Monday, Pakistani journalist Hamid Mir said Ayman al-Zawahri claimed that "smart briefcase bombs" were available on the black market. It was not clear when the interview between Mir and al-Zawahri took place.

U.S. intelligence agencies have long believed that al-Qaida attempted to acquire a nuclear device on the black market, but say there is no evidence it was successful.

Chilling thought. But if true, why haven't they used them yet?