A critical element of the Defense Department's plan to counter Chinese and Russian hypersonic weapons is being hobbled by bureaucratic infighting between the Space Development Agency and the Missile Defense Agency which have jettisoned a 2021 roadmap agreement for key technology development and deployment. That is a pivotal finding of a new audit of the Hypersonic and Ballistic Tracking Space Sensor project by the Government Accountability Office , which finds MDA in the last year has abrogated crucial components of...