Austrian President Alexander Van der Bellen (6th R), Chancellor Christian Kern (5th R), and a number of senior officials attend a memorial service to commemorate the 72nd anniversary of the liberation of the Mauthausen concentration camp in the state of Upper Austria, Austria, May 7, 2017. Austria commemorated the 72nd anniversary of the liberation of the Mauthausen concentration camp on Sunday, with 7,000 people including national leaders attending the memorial service. (Xinhua/Liu Xiang)
