Keywords: aviation aviator erik henning nelson erikhenningnelson erik h. nelson erikhnelson erik nelson eriknelson nelson new orleans neworleans 23-1232 231232 c/n 148 cn148 aircraft airplane united states army air service unitedstatesarmyairservice us air service usairservice us army air service usarmyairservice army air service armyairservice douglas aircraft company douglasaircraftcompany douglas aircraft douglasaircraft dac douglas douglas world cruiser douglasworldcruiser world cruiser worldcruiser douglas dwc douglasdwc dwc liberty 12 liberty12 liberty l-12 libertyl12 l-12 l12 liberty engine libertyengine jack harding jackharding harding outdoor From the Frank S. "Luke" Luqueer Photo Collection Repository: San Diego Air and Space Museum Archive From the Frank S. "Luke" Luqueer Photo Collection Repository: San Diego Air and Space Museum Archive |