An aerial view of damage to neighborhoods in Moore, Oklahoma May 21, 2013, seen in the aftermath of a tornado which ravaged the suburb of Oklahoma City. Rescuers went building to building in search of victims and survivors picked through the rubble of their shattered homes on Tuesday, a day after a massive tornado tore through the Oklahoma City suburb of Moore, wiping out blocks of houses and killing at least 24 people. REUTERS/Rick Wilking (UNITED STATES - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY)