George Carlin (1937-2008) is posthumously awarded the 11th Mark Twain Prize for American Humor. Among those paying tribute are Bill Maher, Denis Leary, Garry Shandling, Joan Rivers, Jon Stewart, Lewis Black, Lily Tomlin, Margaret Cho and Richard Belzer. From the John F. Kennedy Center for the Performing Arts in Washington, D.C.
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TVGuide.com editors break down theories about what's coming up on The Walking Dead