With all the attention that Area 51's been getting recently, flying saucers are coming to the forefront of meme activity around the nation. With that in-mind, I thought I'd pose the question: why did Trek designers make so many ships to have a saucer section in Starfleet? Did show/model designers believe that flying saucers were built by the Air Force and would evolve into a Space Force? Now we take the design for granted, but any number of other designs would have sufficed. If any flying saucers are uncovered at Area 51, one of the first things any of us will look for is whether they have warp nacelles attached (and whether they glow with our color-of-choice).