Q:Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. North American T-28 Trojan -  The North American Aviation T-28 Trojan was a piston-engined military trainer aircraft used by the United States Air Force and United States Navy beginning in the 1950s. Besides its use as a trainer the T-28 was successfully employed as a Counter-insurgency (COIN) aircraft primarily during the Vietnam War.
A:
Mean Of Transportation