SAN ANTONIO – From a chapel pulpit on Lackland Air Force Base, where every American airman reports for basic training, Col. Glenn Palmer delivered his first order to nearly 600 recruits seated in the pews: If you’re sexually harassed or assaulted, tell someone.

“My job is to give you a safe, effective training environment,” Palmer said firmly.

What the colonel did not mention directly in his recent address was a widening sex scandal that has rocked the base, one of the nation’s busiest military training centers. Allegations that male instructors had sex with, and in one case raped, female trainees have led to criminal charges against four men. Charges against others are possible.