Volunteers form a chain as they retrieve clothing and other household items at a home destroyed by a tornado, across the street from the Plaza Towers elementary school in Moore, Oklahoma May 22, 2013. The massive tornado on Monday afternoon flattened entire blocks of the town, killed at least 24 people and injured about 240 in Moore. REUTERS/Rick Wilking (UNITED STATES - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY)
Volunteers form a chain as they retrieve clothing and other household items at a home destroyed by a tornado, across the street from the Plaza Towers elementary school in Moore, Oklahoma May 22, 2013. The massive tornado on Monday afternoon flattened entire blocks of the town, killed at least 24 people and injured about 240 in Moore. REUTERS/Rick Wilking (UNITED STATES - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY)