Of course not, he avoided Vietnam

"It was a tough press conference for President Bush. He spent the first ten minutes trying to pronounce Fallujah. Bush insisted that Iraq is not Vietnam. Of course not, he avoided Vietnam." —David Letterman

"Last night, President Bush gave a prime-time press conference. It was such a big deal that Fox decided to preempt American Idol. Which made sense to me, you don't want too many amateurs on in one night." —David Letterman

"CIA Director George Tenet has now testified before the 9/11 commission and he said we are still making the same dumb mistakes, like leaving memos on the President's desk." —David Letterman