170812-N-JG119-053 PACIFIC OCEAN (Aug. 12, 2017) Aviation Support Equipment Technician 3rd Class Shayne McMahon performs maintenance on a P-25 fire truck aboard the aircraft carrier USS Theodore Roosevelt (CVN 71). Theodore Roosevelt is underway conducting a composite training unit exercise (COMPTUEX) with its carrier strike group in preparation for an upcoming deployment. COMPTUEX tests a carrier strike group’s mission-readiness and ability to perform as an integrated unit through simulated real-world scenarios. (U.S. Navy photo by Mass Communication Specialist 3rd Class Janine F. Jones/Released)