German soldiers open the armored storage door for the 105 mm FlaK 38/39 anti-aircraft gun of the German Flak tower (Flakturm) Tiergarten.
Sources of information about German soldiers photo:
1. mil-history.livejournal.com
2. ru.wikipedia.org
Location: Berlin, Germany
Photo time: April 1942
Photo by: Günter Pilz