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The Global Positioning Systems Directorate at the Space and Missile Systems Center, located at Los Angeles Air Force Base in El Segundo, Calif. marks the 20th anniversary of Full Operational Capability of GPS with a commemorative emblem. (Air Force graphic/William Chavez)


GPS celebrates 20 years

The Global Positioning Systems Directorate at the Space and Missile Systems Center, located at Los Angeles Air Force Base in El Segundo, Calif. marks the 20th anniversary of Full Operational Capability of GPS with a commemorative emblem. (Air Force graphic/William Chavez)