Leaders, states react to Mayan calendar prediction for the end of the world on Friday. The busiest holiday delivery day leaves many questioning just how fast can you ship? Jake Tapper reports the latest on the American gun control debate. Linsey Davis has the latest news from Newtown, Conn. Ginger Zee tracks the latest weather across the country. Martha Raddatz reviews the latest news surrounding the consulate attack in Benghazi, Libya.