File photo taken on June 1, 2017 shows U.S. President Donald Trump leaves after delivering a speech at the White House in Washington D.C., the United States. U.S. President Donald Trump said on Thursday that he has decided to pull the United States out of the Paris Agreement, a landmark global pact to fight climate change. Jan. 20, 2018 reaches one-year mark for Donald Trump as the 45th president of the United States. One year into U.S. President Donald Trump's presidency, the uncertainties and anxieties over his unconventional playbook appear to have not diminished. As he seeks to implement his campaign promises, which seem controversial and even unacceptable to many, rifts, feuds and controversies dogged the year and 2018 would probably not be any different. (Xinhua/Mike Theiler)