[My] photographs are proof of what happened. When I go to Russia, sometimes I meet ex-soldiers… They say: “We came to liberate you….” I say: “Listen, I think it was quite different. I saw people being killed.” They say: No. We never… no shooting. No. No.” So I can show them my Prague 1968 photographs and say: “Listen, these are my pictures. I was there.” And they have to believe me.