Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989, Prague, Czech Republic

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989, Prague, Czech Republic

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989 (China), prepared by Middle East Institute of Faculty of Arts of Charles University in Prague and AcaMedia starts in Prague, Czech Republic, July 22, 2019. (CTK Photo/Vit Simanek)

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989, Prague, Czech Republic

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989, Prague, Czech Republic

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989 (China), prepared by Middle East Institute of Faculty of Arts of Charles University in Prague and AcaMedia starts in Prague, Czech Republic, July 22, 2019. (CTK Photo/Vit Simanek)

STEPHEN B. KING

STEPHEN B. KING

U.S. Ambassador STEPHEN B. KING visits Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989 (China), prepared by Middle East Institute of Faculty of Arts of Charles University in Prague and AcaMedia in Prague, Czech Republic, July 22, 2019. (CTK Photo/Vits Simanek)

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989, Prague, Czech Republic

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989, Prague, Czech Republic

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989 (China), prepared by Middle East Institute of Faculty of Arts of Charles University in Prague and AcaMedia starts in Prague, Czech Republic, July 22, 2019. (CTK Photo/Vit Simanek)

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989, Prague, Czech Republic

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989, Prague, Czech Republic

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989 (China), prepared by Middle East Institute of Faculty of Arts of Charles University in Prague and AcaMedia starts in Prague, Czech Republic, July 22, 2019. (CTK Photo/Vit Simanek)

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989, Prague, Czech Republic

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989, Prague, Czech Republic

Exhibition on massacre suppressing student demonstration at Beijing's Tiananmen Square in 1989 (China), prepared by Middle East Institute of Faculty of Arts of Charles University in Prague and AcaMedia starts in Prague, Czech Republic, July 22, 2019. (CTK Photo/Vit Simanek)