A Sailor tightens bolts with a torque wrench during a radiator install on a MH-60S Knighthawk helicopter in the hangar bay of the Wasp-class amphibious assault ship USS Essex (LHD 2).

PACIFIC OCEAN (May. 30, 2015) Aviation Machinist's Mate 3rd Class Jannice Reyes from Helicopter Sea Combat (HSC) 21 tightens bolts with a torque wrench during a radiator install on a MH-60S Knighthawk helicopter in the hangar bay of the Wasp-class amphibious assault ship USS Essex (LHD 2). (U.S. Navy photo by Mass Communication Specialist 2nd Class Christopher B. Janik) File# 150530-N-YK910-016