--With assistance from Henry Goldman, Christine Buurma and Noah Buhayar in New York, Catherine Dodge and William Selway in Washington, Ted Richardson in Knightdale and Brian K. Sullivan in Boston. Editors: Ted Bunker, Pete Young.
Chris Nelson hugs his daughter Andrea Nelson, 15, in the parking lot in front of Lowe's hardware store in Sanford, North Carolina, on Sunday, April 17, 2011, a day after a tornado destroyed the building while the Nelsons were inside shopping. The Nelsons returned Sunday to reclaim their truck, back right. (AP Photo/Ted Richardson)Annina Purdy, who was inside the Lowe's hardware store in Sanford, North Carolina. the previous day when a tornado destroyed the building, returned to the store's parking lot on Sunday, April 17, 2011, to reclaim personal belongings from her car. (AP Photo/Ted Richardson)Hannah Rosser, 13, who suffered bruising to her ribs the previous day when a tornado hit Lowe's hardware store in Sanford, North Carolina, walks through the Lowe's parking lot on Sunday, April 17, 2011. (AP Photo/Ted Richardson)