The Defense Department is poised this month to significantly expand its fledgling fleet of high-altitude, long-endurance aircraft dedicated to monitor U.S. hypersonic flight tests, a development intended to support plans for an increased pace of assessments as well as opening new corridors for regular testing off the East Coast into the Atlantic Ocean. The Senate Armed Services Committee, in its mark of the fiscal year 2023 defense policy bill, includes a provision urging the defense secretary to encourage the Air...