1976

Hans van Dijk for Anefo, CC0, via Wikimedia Commons

Nobellectures, CC BY-SA 3.0, via Wikimedia Commons

RIA Novosti archive, image #6510 / Leon Dubilt / CC-BY-SA 3.0

RIA Novosti archive, image #6848 / Mikhail Ozerskiy / CC-BY-SA 3.0