** FILE ** President Barack Obama, left, walks away from the podium after talking about the Oklahoma tornado and severe weather, Tuesday, May 21, 2013, in the State Dining Room of the White House in Washington. At right is Homeland Security Secretary Janet Napolitano. (AP Photo/Pablo Martinez Monsivais)
** FILE ** President Barack Obama, left, walks away from the podium after talking about the Oklahoma tornado and severe weather, Tuesday, May 21, 2013, in the State Dining Room of the White House in Washington. At right is Homeland Security Secretary Janet Napolitano. (AP Photo/Pablo Martinez Monsivais)
The steeple of a church at South Janeway Avenue and SW 4th Street lays across the lawn after a tornado moved through Moore, Okla., on Monday, May 20, 2013. (AP Photo/Alonzo Adams)
Kay Taylor stands with her dog Bailey in front of her house that was destroyed after the tornado that hit the area near 149th and Drexel on Monday, May 20, 2013, in Oklahoma City, Okla. (AP Photo/The Oklahoman, Chris Landsberger)
This aerial photo shows damage to Moore Medical Center after it was hit by a massive tornado in Moore, Okla., Monday May 20, 2013. A tornado 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/Steve Gooch)
Two men go through the damage surrounding the Moore Medical Center after a tornado moves through Moore, Okla., on Monday, May 20, 2013. (AP Photo/Alonzo Adams)
The steeple of a church at South Janeway Avenue and SW 4th Street lays across the lawn after a tornado moved through Moore, Okla., on Monday, May 20, 2013. (AP Photo/Alonzo Adams)
Emergency workers pull out a woman who was trapped in a building that was destroyed when a tornado ripped through Moore, Okla., on Monday, May 20, 2013. (AP Photo/The Transcript, Kyle Phillips )
Emergency workers pull out a woman who was trapped in a building that was destroyed when a tornado ripped through Moore, Okla., on Monday, May 20, 2013. (AP Photo/The Transcript, Kyle Phillips )
