Tornado Aftermath In Moore

Debris covers the ground after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma Debris covers the ground after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

A vehicle lies upside down in the road after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma A vehicle lies upside down in the road after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Massive piles of debris cover the ground after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma Massive piles of debris cover the ground after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

People assess the damage after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma People assess the damage after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Only the rubble of a house remains after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma Only the rubble of a house remains after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Nathan Ulepich searches outside of the back of his house, destroyed after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma Nathan Ulepich searches outside of the back of his house, destroyed after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Dana Ulepich searches inside a room left standing at the back of her house, destroyed after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma Dana Ulepich searches inside a room left standing at the back of her house, destroyed after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Dana Ulepich looks at the debris from her house, destroyed by a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma Dana Ulepich looks at the debris from her house, destroyed by a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Yvonne Barragar sits in front of her destroyed house after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma Yvonne Barragar sits in front of her destroyed house after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Piles of debris lie around the north side of Plaza Towers Elementary School after it was damaged by a tornado May 21, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma Piles of debris lie around the north side of Plaza Towers Elementary School after it was damaged by a tornado May 21, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Damaged vehicles are piled up in front of the Warren Theater after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma Damaged vehicles are piled up in front of the Warren Theater after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

People walk through a damaged area near the Warren Theater after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma People walk through a damaged area near the Warren Theater after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Yellow caution tape marks off the area surrounding the heavily damaged Moore Medical Center after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma Yellow caution tape marks off the area surrounding the heavily damaged Moore Medical Center after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Flipped vehicles are piled up outside the heavily damaged Moore Medical Center after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma

MOORE, OK- MAY 20: Flipped vehicles are piled up outside the heavily damaged Moore Medical Center after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. The tornado, reported to be at least EF4 strength and two miles wide, touched down in the Oklahoma City area on Monday killing at least 51 people. (Photo by Brett Deering/Getty Images)

Flipped vehicles are piled up outside the heavily damaged Moore Medical Center after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Cars marked with an orange X, denoting they had been checked for occupants, are piled up in what was the front entrance to the damaged Moore Medical Center after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma Cars marked with an orange X, denoting they had been checked for occupants, are piled up in what was the front entrance to the damaged Moore Medical Center after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

The hood of car is wedged into the front window of the Moore Medical Center after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma The hood of car is wedged into the front window of the Moore Medical Center after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

A Goodwill donation station is surrounded by debris after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)

Tornado Damage In Moore, Oklahoma A Goodwill donation station is surrounded by debris after a powerful tornado ripped through the area on May 20, 2013 in Moore, Oklahoma. (credit: Brett Deering/Getty Images)