Thank you for posting the historical moment! My current Pentagon duties have me considering Air Force innovations and left me wondering 2 Questions:
1) What kind of plane did General Mitchell use when he performed the 1921 bombing? I ask because I suspect "bombers" did not exist, so did they just modify a scout plane, an air-to-air combat plane, a crop duster, or something else?
2) Same question for 1923: Were the high-altitude bombers "newly designed aircraft" or simply basic modifications to some existing airframe?