Emblem of the <a href="https://en.wikipedia.org/wiki/Air_Force_Doctrine_Center" class="extiw" title="en:Air Force Doctrine Center">Air Force Doctrine Center</a>, a former <a href="https://en.wikipedia.org/wiki/Direct_Reporting_Unit" class="extiw" title="en:Direct Reporting Unit">Direct Reporting Unit</a> of the <a href="//commons.wikimedia.org/wiki/United_States_Air_Force" title="United States Air Force">United States Air Force</a>, inactivated in August 2007 when it merged with the College for Aerospace Doctrine, Research and Education Center to form the LeMay Center for Doctrine Development and Education under <a href="//commons.wikimedia.org/wiki/File:Air_University.png" title="File:Air University.png">Air University</a> <a rel="nofollow" class="external autonumber" href="http://www.af.mil/news/story.asp?id=123064923">[1]</a>
<a href="//commons.wikimedia.org/wiki/United_States_Air_Force" title="United States Air Force">United States Air Force</a> (<a href="//commons.wikimedia.org/wiki/User:Pmsyyz" title="User:Pmsyyz">User:Pmsyyz</a> converted to PNG, added transparency, resized to 1000px wide, <a href="https://en.wikipedia.org/wiki/OptiPNG" class="extiw" title="en:OptiPNG">optipng</a> -o7))
<a rel="nofollow" class="external free" href="http://www.af.mil/shared/media/ggallery/hires/afg-040923-001.jpg">http://www.af.mil/shared/media/ggallery/hires/afg-040923-001.jpg</a>