![Participants dressed as NVA soldiers wear gas masks during the "reality event" one night at the "Bunker-Museum" in Rennsteighoehe near the eastern city of Ilmenau October 12, 2013. The museum is a Participants dressed as NVA soldiers wear gas masks during the "reality event" one night at the "Bunker-Museum" in Rennsteighoehe near the eastern city of Ilmenau October 12, 2013. The museum is a](https://c8.alamy.com/comp/2CX2YAW/participants-dressed-as-nva-soldiers-wear-gas-masks-during-the-reality-event-one-night-at-the-bunker-museum-in-rennsteighoehe-near-the-eastern-city-of-ilmenau-october-12-2013-the-museum-is-a-former-east-german-bunker-built-in-the-1970s-to-shelter-the-districts-command-unit-in-an-emergency-the-3600-square-meter-bunker-now-offers-visitors-the-chance-to-stay-there-overnight-as-part-of-a-historical-reality-experience-depending-on-the-size-of-their-group-guests-can-pay-109-euros-each-for-a-16-hour-stay-during-which-they-wear-national-peoples-army-nva-uniform-and-are-treated-as-fo-2CX2YAW.jpg)
Participants dressed as NVA soldiers wear gas masks during the "reality event" one night at the "Bunker-Museum" in Rennsteighoehe near the eastern city of Ilmenau October 12, 2013. The museum is a
German 'Gummimaske' model 15 gas mask third type : Chaplain D B Blackwood MC MID, 13th Brigade AIF | Australian War Memorial
![East German border guards wearing gas mask look over the wall onto Potsdamer Platz in Berlin, Germany, 21 June 1988. After stones were thrown at the police by West Berlin occupiers of East German border guards wearing gas mask look over the wall onto Potsdamer Platz in Berlin, Germany, 21 June 1988. After stones were thrown at the police by West Berlin occupiers of](https://c8.alamy.com/comp/E7DHPB/east-german-border-guards-wearing-gas-mask-look-over-the-wall-onto-E7DHPB.jpg)