A MH-53E Sea Dragon helicopter assigned to Helicopter Combat Support Squadron Four (HC-4) undergoes pre-flight checks at the Naval Air Station (NAS) Sigonella flight line before a mission.

Naval Air Station Sigonella, Sicily (Jul. 22, 2004) A MH-53E "Sea Dragon" helicopter assigned to Helicopter Combat Support Squadron Four (HC-4) undergoes pre-flight checks at the Naval Air Station (NAS) Sigonella flight line before a mission. HC-4 is based in Sigonella and transports cargo, passengers and performs a wide range of heavy helicopter combat support missions, including mine-countermeasures operations. Sigonella provides logistics support for Commander, Sixth Fleet and North Atlantic Treaty Organization (NATO) forces in the Mediterranean area of operation. U.S. Navy photo by Journalist 2nd Class Stephen P. Weaver File# 040722-N-5821W-004