Clearly, this is where the future is headed. Scary stuff. Dogo, from General Robotics, is a tiny 26-pound remote controlled robotic tank that has an onboard 9mm Glock pistol. IT even has two-way audio, presumably so you can do your best Arnold Schwarzenegger impression before pulling the virtual trigger. “It trundles along at 2.5 miles an hour for at least two hours...