NASA<p>40 Years Ago: STS-51C, the First Dedicated Department of Defense Shuttle Mission <a href="https://www.nasa.gov/history/40-years-ago-sts-51c-the-first-dedicated-department-of-defense-shuttle-mission/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">nasa.gov/history/40-years-ago-</span><span class="invisible">sts-51c-the-first-dedicated-department-of-defense-shuttle-mission/</span></a> <a href="https://social.beachcom.org/tags/NASA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NASA</span></a> <a href="https://social.beachcom.org/tags/JohnsonSpaceCenter" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>JohnsonSpaceCenter</span></a> <a href="https://social.beachcom.org/tags/NASAHistory" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NASAHistory</span></a> <a href="https://social.beachcom.org/tags/STS51C" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>STS51C</span></a></p>