Oklahoma City mayor says 12,000 to 13,000 homes damaged or destroyed by May 20 tornado - Article Photos 10/565

Reggie Ayers, left, and a neighbor look over the progress they had made in adding a tarp to his roof after storm damaged his home and knocked down trees in the Hidden Valley addition in southeast Edmond. PHOTO BY LILLIE-BETH BRINKMAN, THE OKLAHOMAN