Optical illusion to aid aerial warfare in Berlin, Germany. HD Stock Footage

CriticalPast is an archive of historic footage. The vintage footage in this video has been uploaded for research purposes, and is presented in unedited form. Some viewers may find some scenes or audio in this archival material to be unsettling or distressing. CriticalPast makes this media available for researchers and documentarians, and does not endorse or condone any behavior or message, implied or explicit, that is seen or heard in this video. Link to order this clip: Historic Stock Footage Archival and Vintage Video Clips in HD. Optical illusion to aid aerial warfare in Berlin, Germany. Men spread a large piece of cloth which shows dark figure of an aircraft painted on cloth. Aircraft parked in the background on field. Aircraft in flight with the cloth hanging beneath which looks like two planes in flight. Cloth is detached from plane while aircraft flies. Piece of cloth falls down. Location: Berlin Germany. Date: January 5, 1931. Visit us at : 57,000 broadcast-quality historic clips for immediate download. Fully digitized and searchable, the CriticalPast collection is one of the largest archival footage collections in the world. All clips are licensed royalty-free, worldwide, in perpetuity. CriticalPast offers immediate downloads of full-resolution HD and SD masters and full-resolution time-coded screeners, 24 hours a day, to serve the needs of broadcast news, TV, film, and publishing professionals worldwide. Still photo images extracted from the vintage footage are also available for immediate download. CriticalPast is your source for imagery of worldwide events, people, and B-roll spanning the 20th century.