US Air Force begins using Boeing surveillance satellite
WASHINGTON – After telling Congress it needed $11.5 million less than it expected this year for an upcoming space surveillance mission, the U.S. Air Force said July 22 it still plans to launch the next Space Based Space Surveillance (SBSS) system in 2021.The current SBSS satellite, the Block 10 pathfinder, was launched in 2010 and is expected to last until about 2020, according to budget documents.