 Who would ever think to put asphalt in a fuel? That's so strange. I know, I read that and I was like, asphalt, really? And at this time, Martin Summerfield was also in charge of a parallel liquid-fueled rocket program, which eventually landed on a rocket engine fueled by a reaction of aniline and red-fuming nitric acid, RFNA. You can't say that one. You have to spell it.