A House panel has proposed legislation that would require the Air Force and Missile Defense Agency to map out a plan to develop and demonstrate an operational prototype of a space-based sensor layer to provide precision tracking data of enemy ballistic missiles "at the earliest practicable opportunity." The House Armed Services strategic forces subcommittee, in its mark of the fiscal year 2018 defense authorization bill , urges the Pentagon to prioritize the design, development and deployment of such a capability...