Two Beechcraft T-34 Mentor primary trainers, marked for the U.S. Navy and U.S. Air Force respectively, perform a smoke-trailing formation pass during a June 2014 air show. The T-34 served as the standard entry-level trainer for both services from the 1950s onward, giving generations of pilots—including many who went on to fly in Vietnam—their first taste of military flight. Project: 219309