Colorado Shooting Brings the Nation to a Halt

The nation is in mourning after a gunman wearing a gas mask and bullet-proof vest killed 12 people at a midnight premiere of the new “Batman” movie in Colorado.

The Century 16 movie theatre is seen where a gunmen attacked movie goers during an early morning screening of the new Batman movie, "The Dark Knight Rises" July 20, in Aurora, Colo. Thomas Cooper/Getty Images