AP Photo/Charlie Riedel
Brent Long looks over a devastated Joplin, Mo. neighborhood as he helps a friend salvage belongings Monday, May 30, 2011. An EF-5 tornado tore through much of the city May 22, damaging a hospital and hundreds of homes and businesses.
AP Photo/J. Scott Applewhite
President Barack Obama, second from left, with residents views damage from the tornado that devastated Joplin, Mo., May 29, 2011.
AP Photo/Charlie Riedel
Joplin residents Paula Barnett, left, and Susan Dodson console each other during a memorial service Sunday, May 29, 2011, marking the one week anniversary of an EF-5 tornado which ripped a six mile long path of destruction through Joplin, Mo.
AP Photo/Charlie Riedel
A search and rescue team surveys the area from atop the rubble of a destroyed building in Joplin, Mo. on Saturday, May 28, 2011.
Getty Images/Joe Raedle
Shanie Spencer salvages what she can from what remains of her house on May 28, 2011 in Joplin, Mo.
Getty Images/Joe Raedle
A sign reading, "keep out God Sees You!" is seen on the wall in front of a home that was damaged when a massive tornado, May 27, 2011 in Joplin, Mo. The town continues the process of recovering from the storm.
Getty Images/Joe Raedle
Brandy Cossey holds a picture of her half sister that she found in the debris of her step-mothers house that was destroyed by a massive tornado on May 27, 2011 in Joplin, Missouri.
Getty Images/Joe Raedle
A torn American flag hangs on a pole outside of a house that was damaged during a massive tornado on May 27, 2011 in Joplin, Mo. after the EF-5 tornado ripped through the town of about 50,000 on May 22.
Getty Images/Joe Raedle
Shirley Bernings stands in what is left of her living room after the house was destroyed during a massive tornado, May 27, 2011 in Joplin, Mo.
AP Photo/Charlie Riedel
Pastor John Ennis, from Columbus, Ohio, walks away after looking at a car that landed in a swimming pool and helping a resident of a devastated Joplin, Mo. neighborhood salvage items, May 26, 2011.
Getty Images/Joe Raedle
Lola Elbert helps look for items to salvage from her grandmother's house that was destroyed by a tornado passed through the town, May 26, 2011 in Joplin, Mo.
Getty Images/Joe Raedle
Maggie Burlingane gathers what she can from her daughter's home on May 26, 2011 in Joplin, Missouri. The town continues the process of recovering from the storm.
AP Photo/Charlie Riedel
A search and rescue team member looks for victims at a devastated apartment complex in Joplin, Mo., May 26, 2011. An EF-5 tornado tore through much of the city on May 22, damaging a hospital and hundreds of homes and businesses.
Getty Images/Joe Raedle
A sign is seen in front of a destroyed house indicating that it is for sale and that it includes a large sun room, May 26, 2011 in Joplin, Mo.
Getty Images/Joe Raedle
A sign indicates that free stuff is available inside a home that was destroyed when a massive tornado on May 26, 2011 in Joplin, Mo.
AP Photo/Mark Humphrey
Wylie Boatright, a member of the Elks Lodge #501, looks through wreckage of the lodge on May 26, 2011, in Joplin, Mo. Four people died in the building when a tornado tore through much of the city on May 22. The building in the background is the damaged St. John's Regional Health Center.
Getty Images/Joe Raedle
Bret Gibson looks at a photograph of his mother and her brothers that he found in the remains of her house after it was destroyed when a massive tornado passed through the town on May 26, 2011 in Joplin, Mo.
