National Security Space Launch
National Security Space Launch ( NSSL ) — formerly Evolved Expendable Launch Vehicle ( EELV ) from 1994 to 2019 — is a program of the United States Space Force ( USSF ) intended to assure access to space for United States Department of Defense and other United States government payloads . 
<triplet> National Security Space Launch <subj> United States Space Force <obj> operator <triplet> United States Department of Defense <subj> United States government <obj> parent organization <triplet> United States government <subj> United States Department of Defense <obj> subsidiary