Entertainers Jon Stewart, Bill Maher, Garry Shandling, Lily Tomlin, Denis Leary, Joan Rivers, Lewis Black, Richard Belzer and Margaret Cho honor the late George Carlin, recipient of the 11th Mark Twain Prize for American Humor. The program, taped at the Kennedy Center Concert Hall on November 10, recognizes the life and achievements of the beloved comedian. The Mark Twain Prize announcement was made a week before the comedian's death. The award was presented posthumously for the first time in its 11-year history.