RAYTHEON has $511m U.S. Air Force contract to operate, maintain, and sustain the Cobra Dane radar in Alaska.   LOCKHEED MARTIN has $8.1m contract to support operations/sustainment for Advanced Extremely High Frequency, Milstar, and Defense Satellite Communications System III.    AEROVIRONMENT INC. has $9m U.S. Army contract for RQ-20B Puma AE II M3/M4 systems and support for Egypt.   BELL has $9.9m U.S. Navy contract for procurement of up to three Bell 407 variant ...