What's next? U.S. set sights on Iran, North Korea

The Bush administration has pledged to end the nuclear weapons programs in Iran and North Korea after concluding its campaign against the Iraqi regime of Saddam Hussein.

"In the aftermath of Iraq, dealing with the Iranian nuclear weapons program will be of equal importance as dealing with the North Korean nuclear weapons program," Assistant Secretary of State John Bolton said. "This is going to be a substantial challenge."

National Security Adviser Condoleezza Rice agreed. She said Iran will continue to be regarded as a rogue regime and would come under close examination by Washington.

"Sometimes people think we're a little bit 'the-sky-is-falling, the-sky-is-falling' on these regimes that the president called the axis of evil," Rice said