The CH-53 Sea Stallion (Sikorsky S-65) is a family of heavy-lift transport helicopters designed and built by Sikorsky Aircraft. Originally developed for use by the United States Marine Corps, it is currently in service with Germany, Iran, Israel, and Mexico. The United States Air Force operated the HH-53 "Super Jolly Green Giant" during the late– and post–Vietnam-War era, updating most of them as the MH-53 Pave Low.