Defending Your Castle

Your home is your castle, but could it withstand an attack by Attila and the Huns, Ragnar and the Vikings, Alexander and the Greeks, Genghis Khan and the Mongols, or Tamerlane and the Tartars?

Engineer William Gurstelle, author of the bestselling Backyard Ballistics, poses this fascinating question to modern-day garage warriors and shows how to build an arsenal of ancient artillery and fortificat...