Article Photos: Obama grieves, promises to use power to help 8/12

President Barack Obama speaks 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 Sandy Hook Elementary School Friday and opened fire, killing 26 people, including 20 children.  (AP Photo/ Evan Vucci)