21st Mission Support Squadron emblem.  Approved21 January 1996.
<a href="https://en.wikipedia.org/wiki/United_States_Army_Institute_of_Heraldry" class="extiw" title="en:United States Army Institute of Heraldry">en:United States Army Institute of Heraldry</a>
1996-01-21
<a rel="nofollow" class="external free" href="http://www.afhra.af.mil/About-Us/Fact-Sheets/Display/Article/433296/21-force-support-squadron-afspc/">http://www.afhra.af.mil/About-Us/Fact-Sheets/Display/Article/433296/21-force-support-squadron-afspc/</a>