Newly-inaugurated U.S. President Donald Trump and his wife Melania Trump, U.S. Vice President Mike Pence and his wife Karen Pence stand on the steps of U.S. Capitol as former U.S. President Barack Obama and his wife Michelle Obama leave after Donald Trump was sworn in as the 45th President of the United States in Washington D.C., the United States, on Jan. 20, 2017. (Xinhua/Bao Dandan)
