Unit patch of the 1st Aircraft Maintenance Unit, a U.S. Air Force unit maintaining the <a href="//commons.wikimedia.org/wiki/Boeing_E-4" title="Boeing E-4">Boeing E-4</a>, 55th Wing, Offutt AFB, NE.
U.S. Air Force
<a rel="nofollow" class="external free" href="https://www.my.af.mil/gcss-af/USAF/AFP40/Multimedia/20080128/1st-AMU.gif">https://www.my.af.mil/gcss-af/USAF/AFP40/Multimedia/20080128/1st-AMU.gif</a>