20th Helicopter Squadron emblem.  Approved 22 May 1957 or 7 July 1958
<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>
1958-07-07
Patch at <a rel="nofollow" class="external free" href="http://www.ljmilitaria.com/usafsosaircontrolarrsarefs/usaf_sos_acs___special_activities_units_20th___up.htm">http://www.ljmilitaria.com/usafsosaircontrolarrsarefs/usaf_sos_acs___special_activities_units_20th___up.htm</a>  edited with Microsoft Paint