The Lockheed Flatbed was a proposed cargo aircraft design from the 1980s that mounted large loads in the open on the back of the aircraft similar to a flatbed truck. The name flatbed was unofficial a more formal name was never assigned. Although there was a fair amount of public information released about the design in the early 1980s the design was never picked up by the US Air Force and disappeared by the mid-80s. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
The answer to this question is:
Mean Of Transportation