1957th Communications Group emblem.  Approved 17 July 1978.  Later designated 1957th Information Systems Group, 1957th Communications Group, 624th Air Operations Center.  This emblem was replaced on 2 May 2012.
<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>
<a rel="nofollow" class="external free" href="https://military.wikia.org/wiki/624th_Operations_Center">https://military.wikia.org/wiki/624th_Operations_Center</a>