Article Photos: Oklahoma City mayor says 12,000 to 13,000 homes damaged or destroyed by May 20 tornado 217/564

Plaza Towers 3rd-grade teacher Cheryl Littlejohn hugs 4th-grader Tori Roysdon, 11, during a meet and greet with teachers and students from Plaza Towers Elementary at Eastlake Elementary School in Oklahoma City, Thursday, May 23, 2013. Seven Plaza Towers students died when a tornado destroyed the school in Moore, Okla., on Monday. Photo by Nate Billings, The Oklahoman