This photo provided by KFOR-TV shows homes flattened outside Moore, Okla., Monday, May 20, 2013. A monstrous tornado as much as a mile wide roared through the Oklahoma City suburbs Monday, flattening entire neighborhoods, setting buildings on fire and landing a direct blow on an elementary school. (AP Photo/KFOR-TV) MANDATORY CREDIT
This frame grab provided by KWTV shows a tornato in Oklahoma City Monday, April 20, 2013. Television footage shows flattened buildings and fires after a mile-wide tornado moved through the Oklahoma City area.