![Students of Watkins Elementary School participate in the 13th annual reading of Martin Luther King's 'I Have a Dream' speech event at Lincoln Memorial in Washington D.C., capital of the United States, on Feb. 24, 2017 to commemorate the civil rights leader. Students of Watkins Elementary School participate in the 13th annual reading of Martin Luther King's 'I Have a Dream' speech event at Lincoln Memorial in Washington D.C., capital of the United States, on Feb. 24, 2017 to commemorate the civil rights leader.](136083984_14879837324341n.jpg)
Students of Watkins Elementary School participate in the 13th annual reading of Martin Luther King's "I Have a Dream" speech event at Lincoln Memorial in Washington D.C., capital of the United States, on Feb. 24, 2017 to commemorate the civil rights leader. (Xinhua/Bao Dandan)