A triage area is set up next to the IMAX theatre for people injured by a tornado that struck in Moore, Oklahoma May 20, 2013. A 2-mile-wide (3-km-wide) tornado tore through the Oklahoma City suburb of Moore on Monday, killing at least 51 people while destroying entire tracts of homes, piling cars atop one another, and trapping two dozen school children beneath rubble. REUTERS/Gene Blevins (UNITED STATES - Tags: DISASTER ENVIRONMENT HEALTH)
A triage area is set up next to the IMAX theatre for people injured by a tornado that struck in Moore, Oklahoma May 20, 2013. A 2-mile-wide (3-km-wide) tornado tore through the Oklahoma City suburb of Moore on Monday, killing at least 51 people while destroying entire tracts of homes, piling cars atop one another, and trapping two dozen school children beneath rubble. REUTERS/Gene Blevins (UNITED STATES - Tags: DISASTER ENVIRONMENT HEALTH)