Article Photos: Oklahoma City-area school districts say security is beefed up

Mourners carry balloons as the walk to a memorial for the victims of the Sandy Hook Elementary School shooting, Monday, Dec. 17, 2012, in Newtown, Conn. (AP Photo/David Goldman) ORG XMIT: CTDG125

Mourners carry balloons as the walk to a memorial for the victims of the Sandy Hook Elementary School shooting, Monday, Dec. 17, 2012, in Newtown, Conn. (AP Photo/David Goldman) ORG XMIT: CTDG125