97E, pronounced "ninety seven echo" was the Military Occupational Specialty (MOS) code designating a Human Intelligence Collector in the U.S. Army, formerly known as Interrogator Prisoner of War. 97Es, or "Echoes" as they are commonly called, screen human intelligence sources and documents for priority information, conduct liaison meetings, interviews, and interrogation during wartime. Until recently, all 97Es were required to be proficient in a foreign language, which was often learned at the Defense Language Institute. Since the beginning of the wars in Afghanistan and Iraq, Echoes have proven to be in extremely short supply and this requirement has been waived. Currently, the MOS code has been re-designated to 35M.