RED SPRINGS — On its face, the Emerging Technology Institute in Red Springs promotes STEM education — wowing school kids with drones and dog robots. But behind the scenes, the well-connected defense contractor reveals its other mission: Offering military-style urban and rural tactical training with role players and drones. Rifle and pistol marksmanship. Exercises in countering “emerging threats.” A 250-foot firing range capable of handling up to 5.56-caliber weapons, which includes assault rifles, such as AR-15s.