Article Photos: Oklahoma tornado: EF5 tornadoes like Monday's are very rare 285/548

United State Secretary of Homeland Security Janet Napolitano addresses the media at a press conference concerning damage from Monday's tornado on Wednesday, May 22, 2013 at city hall in Moore, Okla. Behind left is Oklahoma Emergency Management Director Albert Ashwood and at right is Senator Tom Cole.  Behind Napolitano is Gail McGovern with the American Red Cross. Photo by Steve Sisney, The Oklahoman