The Missile Defense Agency has awarded Lockheed Martin a $407 million sole-source contract to continue developing the Aegis Guam System, pushing the company's underlying Aegis Ballistic Missile Defense weapon system contract above $1.9 billion as work accelerates toward a 2027 early operational capability. The contract awarded May 7 by MDA at Dahlgren, VA “continues engineering, development and certification for Integrated Air and Missile Defens…