Complex sentence: It was then reassigned to Third Air Force under control of HQ USAAF, and based in Colorado Springs, CO.6th photo received film from aerial reconnaissance units deployed around the world in combat areas, then using photogrammetric equipment developing detailed maps and charts of foreign areas.
Split into simpler sentences: It was then reassigned to the Third Air Force under control of HQ USAAF, and based in Colorado Springs, Colorado. 'Sixth photo' received film from aerial reconnaissance units deployed around the world in combat areas, then using photogrammetric equipment developed detailed maps and charts of foreign areas.