Article Photos: Oklahoma tornadoes: Memorial service set for Oklahoma tornado victims 212/477

Moore Public School superintendent Susan Pierce pauses as she receives a standing ovation before speaking during a district-wide meeting of Moore Public Schools employees at Southern Hills Baptist Church, 8601 Pennsylvania Ave., in Oklahoma City, Wednesday, May 22, 2013, after a tornado struck south Oklahoma City and Moore, Okla., on Monday. Photo by Nate Billings, The Oklahoman