Article Photos: Obama grieves, promises to use power to help 11/12

President Barack Obama pauses as he delivers a speech during an interfaith vigil for the victims of the Sandy Hook Elementary School shooting on Sunday, Dec. 16, 2012, at Newtown High School in Newtown, Conn.  A gunman walked into the elementary school Friday and opened fire, killing 26 people, including 20 children.  (AP Photo/Evan Vucci)