12/23: Americans demand tighter gun control; Blizzards and tornados on Christmas Day 12/18: Amid funerals, schools reopen in Newtown; "Plan B" to "fiscal cliff" negotiations As more children are laid to rest in Newtown, Conn., classrooms have re-opened for the first time since the Sandy Hook Elementary School massacre. Jim Axelrod reports on a grieving town's struggle to get back to normal; And, House Speaker John Boehner unveiled what he called "Plan B," backup legislation, in case he and the president cannot strike a deal in their "fiscal cliff" negotiations.