An LGM-35A Sentinel intercontinental ballistic missile (ICBM) has been vertically stacked at Vandenberg Space Force Base, California, as preparations continue ahead of the missile’s anticipated first test launch next year. The LGM-35A Sentinel, built by Northrop Grumman, is due to replace the U.S. Air Force’s venerable force of LGM-30 Minuteman III missiles which have stood […]