In this photo taken Friday, Oct. 9, 2015, MegaBots founders from left, Brinkley Warren, Matt Oehrlein and Gui Cavalcanti stand below their 15-foot tall, piloted Mk.II robot at the Pioneer Summit in Redwood City, Calif. Let the giant robot wars begin. A team of American engineers challenged a group in Japan to a battle for robot supremacy, and the Japanese said bring it on. So Oakland-based MegaBots has launched a Kickstarter campaign to raise money to turn the Mk.II, into a real fighting machine, ready for hand-to-hand combat. (AP Photo/Eric Risberg)