David Letterman gave a heartfelt tribute to Robin Williams Monday. The Late Show did not tape any new episodes in the days after the 63-year-old actor committed suicide, so Letterman assembled a touching 10-minute package that featured memorable clips from Williams’ appearances on the program. The host also said he’d been friends with the star for 38 years. Letterman said, “Many things come to mind in a situation like this, and of course, more questions are raised than can possibly be answered.”
