The U.S. Navy's revolutionary DD(X) destroyer program passed two critical milestones in the past month with the successful completion of Preliminary Design Reviews (PDRs) by the U.S. Navy on two of the ship's subsystems: the Total Ship Computing Environment (TSCE) and the MK 57 Vertical Launching System (VLS). Under a three-year $1.3 billion contract, Raytheon Integrated Defense Systems serves as the weapon and electronic systems integrator for DD(X) -- the next-generation destroyer for the U.S. Navy that will revolutionize naval technology for the 21st century. As part of this effort, Raytheon is completing design work on eight major subsystems, including the TSCE and the MK 57 VLS.