Kay James holds her cat as she sits in her driveway after her home was destroyed by the tornado that hit the area on Monday, May 20, 2013 in Oklahoma City, Okla. (AP Photo/The Oklahoman, Chris Landsberger)
A shopping plaza lies in ruin after a huge tornado struck Moore, Oklahoma, near Oklahoma City, May 20, 2013. A massive tornado tore through the Oklahoma City suburb of Moore on Monday, killing at least 51 people as winds of up to 200 miles per hour (320 kph) flattened entire tracts of homes, two schools and a hospital, leaving a wake of tangled wreckage. REUTERS/Richard Rowe (UNITED STATES – Tags: DISASTER ENVIRONMENT
People walk near destroyed buildings and vehicles after a tornado struck Moore, Oklahoma, near Oklahoma City, May 20, 2013. At least 91 people, including 20 children, were feared killed when a 2 mile wide tornado tore through the Oklahoma City suburb of Moore, trapping victims beneath the rubble as one elementary school took a direct hit and another was destroyed. REUTERS/Gene Blevins (UNITED STATES – Tags: ENVIRONMENT DISASTER)
A boy is pulled from beneath a collapsed wall at the Plaza Towers Elementary School following a tornado in Moore, Okla., Monday, May 20, 2013. A tornado as much as a mile (1.6 kilometer) wide with winds up to 200 mph (320 kph) roared through the Oklahoma City suburbs Monday, flattening entire neighborhoods, setting buildings on fire and landing a direct blow on the elementary school. (AP Photo Sue Ogrocki)