WASHINGTON, Aug. 3 -- The U.S. Department of Defense issued the following news release: NAVY Raytheon Co., Tucson, Arizona, was awarded a $159,900,991 firm-fixed-price contract for MK 15 Close-In Weapon System upgrades and conversions, system overhauls, MK 15 Mod 31 SeaRAM upgrade kits and conversions and associated hardware. Work will be performed in Louisville, Kentucky (27%); El Segundo, California (15%); Tucson, Arizona (14%); Williston, Vermont (6%); Tempe, Arizona (4%); Ottobrunn, German more PR