Article Photos: Oklahoma City mayor says 12,000 to 13,000 homes damaged or destroyed by May 20 tornado 328/564

Moore educators stand together and pray at the end of 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