Wolf Blitzer delivers the most important breaking news and political, international, and national security stories of the day. Tune to The Situation Room weekdays 5-6:30pm ET on CNN.
Libya reaches out to the U.S. with a "sense of desperation" as rebels close in on Tripoli. CNN's Jill Dougherty reports.
RELATED STORY: Gadhafi son said to escape; rebels extend grip on Tripoli