SpaceX is building a network of hundreds of spy satellites under a classified contract with a U.S. intelligence agency, five sources familiar with the program said. The network is being built by SpaceX's Starshield business unit under a $1.8 billion contract signed in 2021 with the National Reconnaissance Office (NRO), an intelligence agency that manages spy satellites. The plans show the extent of SpaceX's involvement in U.S. intelligence and military projects and illustrate a deeper Pentagon investment into vast, low-Earth orbiting satellite systems aimed at supporting ground forces. If successful, the sources said the program would significantly advance the ability of the U.S. government and military to quickly spot potential targets almost anywhere on the globe. Reuters reporting discloses for the first time that the SpaceX contract is for a powerful new spy system with hundreds of satellites bearing Earth-imaging capabilities that can operate as a swarm in low orbits. The planned Starshield network is separate from Starlink, SpaceX's growing commercial broadband constellation that has about 5,500 satellites in space. The classified constellation of spy satellites represents one of the U.S. government's most sought-after capabilities in space because it is designed to offer the most persistent, pervasive and rapid coverage of activities on Earth. No one can hide," one of the sources said of the system's potential capability, when describing the network's reach.