EL CENTRO, Calif. (Oct. 14, 2020) An MH-60S Knighthawk helicopter assigned to the "Black Knights" of Helicopter Sea Combat Squadron (HSC) 4, stationed in San Diego, practice Terrain Flight (TERF) and one-wheel landings at Naval Air Facility El Centro, California. 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)