Letterman on post-9/11 show: 'I remember not wanting to go back'

When Regis Philbin asked David Letterman about the difficult decision to return to the air less than a week after 9/11, the "Late Show" host said, "I remember not wanting to go back, not feeling ready to go back, but knowing we had to go back. And you know -- my concerns were minimal compared to people who really suffered."