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  • National Security Space Launch

    The Launch Enterprise Systems Directorate of the Space and Missile Systems Center, Los Angeles Air Force Base, California, manages the National Security Space Launch program (NSSL, formerly the Evolved Expendable Launch Vehicle or EELV) program.  The program provides the United States assured access to space -- defined as at least two launch systems or families of launch systems -- with three families of launch vehicles: Atlas V, Delta IV, Delta IV Heavy, and Falcon 9 and Falcon Heavy. 
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