Congress will launch an investigation into sexual assault, disappearances, deaths and the leadership's response at Fort Hood after 28 soldiers stationed at the U.S. Army base in Texas died this year, two subcommittee leaders announced Tuesday. Democratic Reps. Stephen Lynch of Massachusetts and Jackie Speier of California sent a letter to Army Secretary Ryan D. McCarthy requesting documents and information on the deaths. Lynch chairs the Committee on Oversight and Reform's Subcommittee on National Security, and Speier leads the Committee on Armed Services' Subcommittee on Military Personnel.