Col. Andrea Tullos, commander, 42nd Air Base Wing, greets President Barack Obama as he arrives on Air Force One at Maxwell Air Force Base, Saturday, March 7, 2015. Obama landed at Maxwell to board Marine One to go to Selma, Ala., to speak at the 50th anniversary commemorating the Selma to Montgomery March for voting rights. (US Air Force Photograph by Donna L. Burnett/Released)