Home Archive Search Media Media-458345.jpg FRE 10928 IMAGE Download Image By downloading this image, you are agreeing to our Terms and Conditions A labelled diagram showing the increased armaments and armour of the YB-40 modification of the B-17 Flying Fortress airframe. Revisions Date: 2 Feb 2015 10:00:17 ContributorAAMChangesAAM ingestSourcesIWM, Roger Freeman Collection