Article Photos: Oklahoma tornadoes: President Barack Obama to visit Oklahoma on Sunday 201/548

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