Northrop Grumman got the OK to resume requirements and design work on the launch facilities that will support the Sentinel nuclear missile system, CEO Kathy Warden said today, even though rebaselining on the program continues within the Defense Department. “We made significant progress on the program restructuring in the second quarter,” Warden said during the company’s second-quarter earnings call. “In close partnership with the Air Force, we reached agreement on a restructure approach which will lead to re-establishment of the...