Commemoration of the 2016 terrorist attack at Breitscheidplatz square in Berlin
German President Frank-Walter Steinmeier and Berlin's Mayor Michael Mueller attend a ceremony at the memorial "Der Riss" commemorating the victims of the 2016 terrorist attack on the Christmas market at Breitscheidplatz square in Berlin, Germany, December 19, 2021. REUTERS/Hannibal Hanschke/Pool