Robert De Niro on Billy Crystal | 2007 Mark Twain Prize
Robert De Niro celebrates Billy Crystal during the Mark Twain Prize for American Humor in 2007. The Kennedy Center's Mark Twain Prize for American Humor recognizes individuals who have had an impact on American society in ways similar to the distinguished 19th-century novelist and essayist Samuel Clemens, colloquially known as Mark Twain. As a social commentator, satirist, and creator of characters, Clemens was a fe…