European Council president Donald Tusk arrives at a special European Summit to discuss the European Union's negotiation stance on Brexit talks in Brussels, on April 29, 2017. European Union leaders unanimously adopted their Brexit strategy at a special summit in Brussels, in a show of unity ahead of two years of tough talks with Britain. The 27 leaders quickly agreed on the negotiating guidelines as they met without Britain for the first time since Prime Minister Theresa May triggered the divorce process a month ago. / AFP PHOTO / POOL / OLIVIER HOSLET