U.S. Army Col. John P. Sullivan, U.S. Army Transportation School, chief of transportation and commandant, speaks to audience members at a historic CH-47 Chinook helicopter return ceremony at the U.S. Army Transportation Museum at Fort Eustis, Va., April 11, 2014. Sullivan spoke briefly of the helicopter’s history and his pride to have the aircraft on display at Fort Eustis. (U.S. Air Force photo by Senior Airman Aubrey White/Released)

Audience members bow their heads before the start of a historic ceremony at the U.S. Army Transportation Museum at Fort Eustis, Va., April 11, 2014. The event celebrated the return of a newly refurbished CH-47 Chinook helicopter, the oldest in existence. (U.S. Air Force photo by Senior Airman Aubrey White/Released)

U.S. Army Soldiers enter the back of a CH-47 Chinook helicopter after a ribbon-cutting ceremony to celebrate the return of the newly-refurbished aircraft to the U.S. Army Transportation Museum on Fort Eustis, Va., April 11, 2014. After nearly a year of restorations, the 55-year-old helicopter was displayed at the museum. (U.S. Air Force photo by Senior Airman Aubrey White/Released)