The Air Force on Wednesday awarded National Aerospace Solutions LLC of Reston, Va., a cost-plus-award-fee contract worth an estimated $1.5 billion for test operations and sustainment of Arnold Engineering Development Complex (AEDC), according to a Defense Department statement.The contractor will provide test operations, technology development, equipment and facility sustainment, capital improvements and support. Work is expected to be complete by Sept. 30, 2023. This award is the result of a competitive acquisition with four offers received.Work will be performed at…