A Raytheon developed Lower Tier Air and Missile Defense Sensor, or LTAMDS. The Army has received six prototypes of the future missile defense radar and has begun critical testing of the system. (Photo ...

The U.S. Space Force expects to launch the eighth X-37B mission no earlier than Aug. 21. Credit: U.S. Space Force The U.S. Space Force plans to use its X-37B orbital test vehicle to conduct ...