WASHINGTON — The number of sexual assaults reported at the U.S. Military Academy roughly doubled during the last school year, according to data reviewed by The Associated Press, in the latest example of the armed forces' persistent struggle to root out such misbehavior.It's the fourth year in a row that sexual assault reports increased at the school in West Point, New York. There were 50 cases in the school year that ended last summer, compared with 26 made during the 2015-2016 school year. By comparison, the U.S. Naval Academy in Annapolis, Maryland, and the U.S. Air Force Academy in Colorado Springs, Colorado, saw only slight increases.Defense Department and West Point officials said the big jump at the Military Academy resulted from a concerted effort to encourage victims to come forward.