RTX Corporation RTX has begun a $53 million expansion of its Lower Tier Air and Missile Defense Sensor production facility in Andover, MA. The 23,000-square-foot addition is aimed at boosting the ...

A full scale model of Raytheon's Lower Tier Air and Missile Defense Sensor, a next-generation radar that will defeat advanced threats like hypersonic weapons. (Photo courtesy of Raytheon) The U.S.