Top photos of 2012: Looking back at a historic year
From a wondrous Summer Olympic Games to the reelection of a president, 2012 was a historic year for many reasons. Here's a quick look back at some of the top photos of the year.
Horror in Newtown
Students are led out of Sandy Hook Elementary School in Newtown, Conn. after a gunman opened fire on campus. 26 people were killed, including 20 children.