Lockheed Martin has been awarded a $542 million contract for F-35 equipment and spares for the U.S. military and partners in the program. The contract, announced by the Department of Defense, covers ancillary mission equipment and AME initial spares for Lot 13 F-35 Lightning II aircraft of the Air Force, Marine Corps, Navy, non-Pentagon departments and foreign military sales customers. The F-35 has reached initial operating capacity with the Air Force and Marines, and the Navy is expected to declare it operational early this year.