From Wikipedia: "English: A large wheeled Assyrian battering ram with an observation turret attacks the collapsing walls of a besieged city, while archers on both sides exchange fire. From the North-West Palace at Nimrud, about 865-860 BC; now in the British Museum."
File:Assyrian battering ram.jpg (Thanks, Justin!)
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.