A nurse walks past the destruction at Moore hospital after a huge tornado struck Moore, Oklahoma, near Oklahoma City, May 20, 2013. A huge tornado with winds of up to 200 miles per hour (320 kph) devastated the Oklahoma City suburb of Moore on Monday, ripping up at least two elementary schools and a hospital and leaving a wake of tangled wreckage. REUTERS/Gene Blevins (UNITED STATES – Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY)
A man looks through the remains of a home 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
Destroyed cars are seen after a huge tornado struck Moore, Oklahoma May 20, 2013. REUTERS/Gene Blevins