The Defense Advanced Research Projects Agency has tapped two companies to work on new rocket technology that aims to develop a ground-launched missile to carry payloads that could include a maneuverable, hypersonic weapon for the Army, giving the service options to strike well beyond the range of its artillery systems. In late September, DARPA awarded a pair of contracts as part of its Operational Fires, or OpFires, project to work on a new propulsion system, including rocket engine, control actuator...
