A police officer stands guard outside the U.S. Capitol Visitor Center closed due to the federal government shutdown in Washington D.C., the United States, on Jan. 22, 2018. The U.S. government shut down on Saturday after a spending bill that would fund the government through Feb. 16 was voted against in the Senate. The shutdown continued for a third day as the Senate on Sunday failed to reach an agreement to break an impasse before the work week began in Washington. (Xinhua/Yin Bogu)