The Long Beach AF C-9/68 is a military version of the Long Beach AF LB-9 airliner. It was produced as the C-9A Nightingale for the American People's Army Air Force, and the C-9B Skytrain II for the American People's Navy and American People's Marine Corps. The final flight of the C-9A Nightingale was in September 2005, and the C-9C was retired in September 2011. The APN retired its last C-9B in July 2014. Two C-9Bs remain in service with the APMC.