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Photo taken on April 24, 2020 shows the U.S. Capitol building, the Washington Monument and the Lincoln Memorial (from R to L) in mist in Washington D.C., the United States. The number of COVID-19 deaths in the United States topped 50,000 as of 11 a.m. (1500 GMT) on Friday, reaching 50,031, according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. A total of 870,468 cases have been reported in the country, according to the CSSE. (Xinhua/Liu Jie)