Prague, Czechoslovakia, 13th September 1968, Alexander Dubcek the Czech Communist Party leader crosses a courtyard on his way to a meeting (Photo by Popperfoto via Getty Images/Getty Images)
Prague, Czechoslovakia, 13th September 1968, Alexander Dubcek the Czech Communist Party leader crosses a courtyard on his way to a meeting (Photo by Popperfoto via Getty Images/Getty Images)