EL CENTRO, Calif. (Oct. 7, 2020) Naval Aircrewman (Helicopter) 2nd Class Joshua Harrison, from Nashville, Tenn., prepares for a training flight in a MH-60S Knighthawk helicopter assigned to the "Black Knights" of Helicopter Sea Combat Squadron (HSC) 4, during a training exercise at Naval Air Facility El Centro, Calif. HSC-4 provides vertical lift search and rescue, logistics, anti-surface warfare, special operations forces support, and combat search and rescue capabilities. (U.S. Navy photo by Chief Mass Communication Specialist Shannon Renfroe)