"The satellites help guide aircraft carriers in the Persian Gulf, drones in the skies above Yemen and fighter jets over Syria. American ground troops on patrol in Afghanistan use GPS coordinates to track their movements, and intelligence officers at C.I.A. headquarters in Langley, Va., depend on spy satellites to gather information on adversaries.
“Everything the U.S. military does today relies on space,” said Brian Weeden, the director of program planning at the Secure World Foundation, a nongovernmental organization that studies space policy. Take drones, for instance, he said. “Their signals are routed over satellites. Data is routed over satellites. Intelligence satellites do the B.D.A. after strikes,” he added, referring to battle damage assessments the military makes to determine whether targets have been destroyed."