For nearly five decades, some of the United States military's most secretive operations were conducted out of a collection of nondescript buildings at the intersection of State Route 237 and Mathilda Avenue in Sunnyvale, California. The installation was known by a variety of names in its early years: Satellite Test Center, Air Force Satellite Control Facility, the "Blue Cube," and Sunnyvale Air Force Station. In July 1986, the facility was renamed...