Oklahoma City mayor says 12,000 to 13,000 homes damaged or destroyed by May 20 tornado - Article Photos 123/565

A computer lab at Holmes Park Elementary in Sapulpa doubles as a safe room. The school was designed by LWPB Architecture in Oklahoma City. Lisa Chronister, an architect and principal at the firm, said a computer lab makes sense as a safe room because windows aren't needed and students are only in there occasionally, not all day. Don Shreve - Provided/Shreve Photography