FILE - In this Sunday, Dec. 16, 2012 file photo, mourners arrive in a school bus at Newtown High School for a memorial vigil attended by President Barack Obama for the victims of the Sa

 

              FILE - In this Sunday, Dec. 16, 2012 file photo, mourners arrive in a school bus at Newtown High School for a memorial vigil attended by President Barack Obama for the victims of the Sa
FILE - In this Sunday, Dec. 16, 2012 file photo, mourners arrive in a school bus at Newtown High School for a memorial vigil attended by President Barack Obama for the victims of the Sandy Hook School shooting in Newtown, Conn. A gunman walked into the elementary school Friday and opened fire, killing 26 people, including 20 children. (AP Photo/David Goldman)