Accepted by the Marine Corps on March 14, 1967, this Sea Knight, or more affectionately known as the Phrog to the Marines, flew it's last flight on August 1, 2015. That was the day it was flown to the Smithsonian National Air and Space Museum's Udvar-Hazy Center for prominent display. The helicopter will eventually be transferred to the National Museum of the Marine Corps in Quantico.