2/15: Meteor explodes over Russia; moving on after tragedy

      |The meteor that exploded over Russia caused a lot of damage over a wide area. Anthony Mason speaks with the chief astronomer at the Franklin Institute in Philadelphia for more insight into the rare occurrence; And, Steve Hartman sits with Bill Sherlach who recently received the Presidential Citizen's Medal on behalf of his wife, Mary Sherlach, who was slain in the Sandy Hook Elementary shooting.