U.S. Air Force Staff Sgt. Luis A. Walker arrives from a lunch break during his court martial at Lackland Air Force Base, Monday, July 16, 2012 in San Antonio. Walker, a former training

 

              U.S. Air Force Staff Sgt. Luis A. Walker arrives from a lunch break during his court martial at Lackland Air Force Base, Monday, July 16, 2012 in San Antonio. Walker, a former training
U.S. Air Force Staff Sgt. Luis A. Walker arrives from a lunch break during his court martial at Lackland Air Force Base, Monday, July 16, 2012 in San Antonio. Walker, a former training officer, is charged with illicit sexual contact with 10 female trainees. He is facing 28 counts including rape and is one of 12 instructors under investigation. (AP Photo/The San Antonio Express-News, Jerry Lara)