WASHINGTON — The number of sexual assaults reported across the U.S. military dipped by nearly 4% last year, fueled by a significant drop in the Army, according to a new Pentagon report. It was the second year in a row with a decrease, reversing a troubling trend that has plagued the Defense Department for more than a decade. Senior defense officials said that while the decline is a good sign, the number of reported assaults is still too high and the military needs to do more to get victims to