SAN ANTONIO (AP) — An Air Force instructor implicated in a sweeping sex scandal at one of the nation's busiest military training bases was convicted in military court Friday of raping one female recruit and sexually assaulting several others. Staff Sgt. Luis Walker, the first Lackland Air Force Base instructor to stand trial in the scandal, was found guilty by a jury of seven military personnel on all 28 counts he faced, including rape, aggravated sexual contact and multiple counts of aggravated sexual assault. The jury deleted a clause from two counts that accused Walker of making flirtatious and lewd comments to trainees.