A Democratic senator from the U.S. on Sunday welcomed last week's denuclearization accord with North Korea, but noted that potential loopholes exist, including the North's suspected nuclear weapons program.

Sen. Carl Levin, chairman of the Senate Armed Services Committee, said the Feb. 13th agreement brought the situation back to where it was under the Bill Clinton administration.

He said in an interview with Fox News that U.S. President George W. Bush had taken two steps forward in the last couple of weeks, but that there is still a "long way to go."

He pointed out that the U.S. hasn't gotten a commitment from North Korea on their current nuclear program yet.

Envoys from six countries the two Koreas, the US, China, Russia and Japan signed an accord in Beijing calling for a phased denuclearization of the Korean Peninsula by shutting down Pyongyang's primary nuclear facilities in return for energy aid to the North.

The agreement also states that if the North completely dismantles its nuclear facilities and weapons programs, it will receive greater incentives including the normalization of diplomatic ties.