Building ancient Roman weapon earns Utah, Idaho team $20K on History Channel show
Groesbeck was on the show with Daniel Fagergren and Kory Heaton, both from Hurricane, Utah. They built several items together, but it was their construction of a ballista, a weapon used in ancient Rome to launch stones, spears, arrows and other objects, that earned them a victory. His team took home $20,000, which is about $6,600 apiece.