At exactly one minute to noon, one of the Supply Droids, designation SD-03, powered itself on and disengaged from its charging dock. Then it rolled forward on its tank treads, across the bunker floor, to the armory cage at its opposite end. Two robotic sentries stood outside the armory’s entrance. SD-03 transmitted its equipment requisition order to them—an order that I myself had submitted on the Sixer intranet two days earlier. The sentries verified the requisition and stepped aside, permitting SD-03 to roll into the cage. It continued past long storage racks that held a wide array of weaponry: magic swords, shields, powered armor suits, plasma rifles, railguns, and countless other weapons. Finally, the droid rolled to a stop. The rack in front of it held five large octahedron-shaped devices, each roughly the size of a soccer ball. Each device had a small control panel set into one of its eight sides, along with a serial number. SD-03 found the serial number that matched the one on my requisition form. Then, following a set of instructions I’d programmed into it, the little droid used its clawlike index finger to enter a series of commands on the device’s control panel. When it finished, a small light above the keypad turned from green to red. Then SD-03 lifted the octahedron in its arms. As it exited the armory, one antimatter friction-induction bomb was subtracted from the Sixers’ computerized inventory.