Keywords: observation balloon observationballoon the great war thegreatwar great war greatwar world war i worldwari world war one worldwarone the first world war thefirstworldwar wwi ww1 lighter than air lighterthanair lta military aviation militaryaviation parachute View of a German observation balloon bursting into flames, with a German observer jumping out of the balloon with a parachute, after the balloon was hit by guns from American airplanes somewhere in France during World War I (undated) [Photograph collected by Henry L. Graves]. --From Henry L. Graves Papers, WWI 55, Military Collection, State Archives of North Carolina View of a German observation balloon bursting into flames, with a German observer jumping out of the balloon with a parachute, after the balloon was hit by guns from American airplanes somewhere in France during World War I (undated) [Photograph collected by Henry L. Graves]. --From Henry L. Graves Papers, WWI 55, Military Collection, State Archives of North Carolina |