Jean Logan reacts as she sees the damage to her home in Joplin, Mo., Monday, May 23, 2011 after it was damaged by a tornado that destroyed nearly 30 percent of the town on Sunday afternoon. Logan and her granddaughter rode out the storm in the laundry room. The twister cut a six-mile path through the city. (AP Photo/Tulsa World, Adam Wisneski)

A shelf cloud containing a thunderstorm approaches. (AP Photo/Charlie Riedel)

Emergency workers wait for a medical team after finding a body in a tornado ravaged car. (AP Photo/Charlie Riedel)

A destroyed helicopter lies on its side in the parking lot of the Joplin Regional Medical Center. (AP Photo/Mark Schiefelbein)

Emergency personnel walk through a neighborhood. (AP Photo/Mark Schiefelbein)

Rescue workers in lime-green jackets search for bodies and survivors inside St. John’s hospital. (AP Photo/Tulsa World, Adam Wisneski)

An emergency worker searches a Walmart store that was severely damaged by a tornado. (AP Photo/Charlie Riedel)

Anita Stokes salvages items from her home. (AP Photo/Charlie Riedel)

Jean Logan surveys the damage to her home. Logan and her grandaughter rode out the storm in the laundry room. (AP Photo/Charlie Riedel)

A hand-written note to rescue workers is seen on a house that was damaged by a tornado. (AP Photo/Tulsa World, Adam Wisneski)

A cross stands atop a church that was severely damaged. (AP Photo/Charlie Riedel)

(AP Photo/Tulsa World, Adam Wisneski)

Candice Kell, 17, looks over her psychology textbook inside her grandmother’s home. (AP Photo/Tulsa World, Adam Wisneski)

Residents begin digging through the rubble of their home. (AP Photo/Mike Gullett)

A man carries a young boy who was rescued after being trapped in his home. (AP Photo/Mike Gullett)

Destroyed vehicles are piled on top of one another in the parking lot of the Joplin Regional Medical Center. (AP Photo/Mark Schiefelbein)

(AP Photo/Charlie Riedel)

Pepsi Cola employee Mark Johnson looks at the wreckage of the Pepsi Cola Bottling Plant that was destroyed. (AP Photo/Charlie Riedel)

Residents of Joplin, Mo, walk west on 26th Street near Maiden Lane. (AP Photo/Mike Gullett)

Volunteer firefighters William Jackson, left, and Ashley Martin, center, from Oklahoma, and Johnny Ward of Joplin look through the wreckage of a home where it was feared a pregnant woman as feared to be trapped. The three did not find anyone in their search. (AP Photo/Mark Schiefelbein)

A man walks past destroyed vehicles in the parking lot of the Joplin Regional Medical Center. (AP Photo/Mark Schiefelbein)

Rescuers and neighbors look through the the wreckage of destroyed homes on a hillside. (AP Photo/Mark Schiefelbein)

William Jackson, left, and Ashley Martin, volunteer firefighters from Oklahoma, survey the wreckage of destroyed homes. (AP Photo/Mark Schiefelbein)

People walk down a street lined with destroyed homes. (AP Photo/Mark Schiefelbein)

An emergency vehicle drives through a severely damaged neighborhood. (AP Photo/Charlie Riedel)

Maggie Kelley and her husband, Trey Adams hug their dog, Saint, after finding him amid the rubble of her home. (AP Photo/Tulsa World, Adam Wisneski)

The damaged St. John’s Regional Medical Center is seen in the distance through tornado debris. (AP Photo/Charlie Riedel)

Don Atteberry, 89, crawls over a rail at his home that was severely damaged by a tornado. (AP Photo/Charlie Riedel)

(AP Photo/Charlie Riedel)

A man salvages a guitar from a severely damaged home (AP Photo/Charlie Riedel)

A rescue worker walks past debris at Joplin High School. (AP Photo/Charlie Riedel)

People pass the Joplin Regional Medical Center after it sustained a direct hit from a tornado. (AP Photo/Mark Schiefelbein)

(AP Photo/Mike Gullett)

Clay Warden, right, points out a salvageable tool to his friend Mark Siler as they began to sift through the remains of Warden’s home. Warden and six of his grandchildren survived the tornado that destroyed his home and left him with a few cuts and bruises. (AP Photo/Mike Gullett)

A residential neighborhood in Joplin, Mo., is seen Monday, May 23, 2011 after it was leveled by a tornado that destroyed nearly 30 percent of the town on Sunday afternoon. The twister cut a six-mile path through the city. (AP Photo/Tulsa World, Adam Wisneski)