In a Mail Call video, R. Lee Ermey answers a question from Don of Gresham, Oregon who wants to know the difference between a slick, a dust-off, and a gunship. Ermey says that what Don is talking about is one of his favorite helicopters, the Huey. Although they began as medical helicopters, at the height of the war Hueys had three different functions: they were slicks, dust-offs, or gunships. Slick was the name for the transport version of the Huey, dust-off was the official call sign for medical choppers, and gunships are pretty self-explanatory. Modern versions of the Huey are still being used today!