President of the European Council Donald Tusk, European Commission President Jean-Claude Juncker and the European Union's (EU) chief negotiator Michel Barnier (from L to R) greet each other after a press conference at the end of a special Brexit summit in Brussels, Belgium, Nov. 25, 2018. The European leaders on Sunday endorsed the Brexit deal at the European Union (EU) summit, a major breakthrough since the lengthy Britain-EU Brexit negotiation started one and half years ago. (Xinhua/Ye Pingfan)