President Bush, deferring to the tragedy at Virginia Tech, passed up any attempt to be funny at the White House Correspondents' Assn. dinner Saturday, leaving those efforts to impersonator Rich Little.

Best known for his impersonations of [Richard Nixon] and late-night star Johnny Carson, Little was the featured act for the glitzy dinner with the president, Cabinet secretaries, foreign dignitaries, Hollywood celebrities and journalists.

Before Bush and Little spoke, CBS star David Letterman made a video appearance from his studio with a Top 10 list of taped vignettes showing some of the funniest Bush flubs of the last year.