History: Underground production facility for the German Heinkel He 162 Volksjäger (People's Fighter) jet aircraft. The factory was built by forced labor and slave labor from concentration camps, 1945. [991x706]

http://imgur.com/XtHDX1u.jpg via /r/HistoryPorn http://www.reddit.com/r/HistoryPorn/comments/2wia49/underground_production_facility_for_the_german/