This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Tegel May . Just before lift off of the first flight of the Parseval Experimental Airship Berlin Tegel airfield May Pilot Captain von Krogh unknown author File Parseval Versuchsluftschiff Parseval Experimental Airship in flight PDold Parseval airships Berlin Tegel Airport ImageNote en floppy fourbladed propeller ImageNoteEnd