Benjamin Benneker was not a space marine but that’s probably only because he never got a chance to work with NASA. One of the black men held up to show various small minded bigots like Jefferson that blacks were intellectual equals to the white slave owning, power holders. Among his other accomplishments was hand carving a wooden replica of a pocket watch that kept accurate time, and being a technical assistant on the first federal survey of the land that would become our nations capital. He wrote 28 editions of an almanac that was well regarded even in comparison to Ben Franklin’s, and he was almost an entirely self taught mathematician and astronomer.