FILE - Then German Chancellor Angela Merkel, left, and the Prime Minister of Canada, Justin Trudeau, right, lay down flowers in Berlin, Germany, Friday, Feb. 17, 2017 to commemorate the victims of a terror attack on the Breitscheidplatz in December 2016. The German government says the country will formally commemorate the victims of terrorism every March 11. The date marks the anniversary of the 2004 bomb attacks in Madrid and is already commemorated each year by the European Union. (AP Photo/Michael Sohn,file)