SAN ANTONIO – The women assaulted by their Air Force training instructor don't sleep much these days and when they do, he sometimes haunts their dreams.

They testified Saturday about being suddenly unable to relate to husbands, boyfriends and even fathers and brothers after they were sexually assaulted. One said her fear during a tour of duty in Afghanistan was heightened by soldiers who reminded her of her instructor, and she warned her younger sister not to enlist in the Air Force. Another said she's now afraid to be behind closed doors with any man.

Staff Sgt. Luis Walker was sentenced to 20 years in prison Saturday for crimes that included rape and sexual assault. He is among 12 instructors investigated for sexual misconduct toward at least 31 female trainees at one of the nation's busiest military training centers. Six have been charged with crimes, and the counts against Walker were the most severe. He could have faced life in prison.