U.S. Marine Corps Staff Sgt. Zachary Hilko, left, an

U.S. Marine Corps Staff Sgt. Zachary Hilko, left, an aviation supply chief, executes an armbar on Cpl. Luis Alicea, right, a ground support equipment mechanic, both with Marine Aircraft Group 49, 4th Marine Aircraft Wing, Marine Forces Reserve, during Martial Arts Instructor Course 1-19 at Naval Air Station Joint Reserve Base New Orleans on May 22, 2019. Marines use armbars by applying pressure on their opponent’s locked elbow. To increase readiness and to support the total force, Reserve and active Marines with MARFORRES participate in the MAI Course. (U.S. Marine Corps photo by Lance Cpl. Preston L. Morris)