Morning Buzz: May 21, 2007

This morning's top stories:

• Lebanese groups clashed with suspected terrorists with al Qaeda ties in a camp over the weekend, killing dozens in the worst violence in the country since the civil war that ended in 1990.
• Meanwhile, 25 insurgents were killed in southern Afghanistan after ambushing coalition troops.
• After 17 years of hibernation, a swarm of cicadas is expected to descend on the Midwest this summer.
• The Senate is preparing for a "no confidence" vote on Attorney General Alberto Gonzales this week, a rare measure that would be a major blow to the embattled Bush aide's credibility.