A cleaner walks by two placards reminding people of COVID-19 safety at the Lincoln Memorial in Washington D.C., the United States, on April 16, 2020. The number of COVID-19 cases in the United States topped 650,000 by 4 p.m. local time on Thursday (2000 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Xinhua/Liu Jie)
People jog at the Lincoln Memorial in Washington D.C., the United States, on April 16, 2020. The number of COVID-19 cases in the United States topped 650,000 by 4 p.m. local time on Thursday (2000 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Xinhua/Liu Jie)
A woman jogs near the Washington Monument in Washington D.C., the United States, on April 16, 2020. The number of COVID-19 cases in the United States topped 650,000 by 4 p.m. local time on Thursday (2000 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Xinhua/Liu Jie)
Few cars are seen near the White House in Washington D.C., the United States, April 16, 2020. The number of COVID-19 cases in the United States topped 650,000 by 4 p.m. local time on Thursday (2000 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Xinhua/Liu Jie)
Photo taken on April 16, 2020 shows the Washington Monument in Washington D.C., the United States. The number of COVID-19 cases in the United States topped 650,000 by 4 p.m. local time on Thursday (2000 GMT), according to the Center for Systems Science and Engineering (CSSE) at Johns Hopkins University. (Xinhua/Liu Jie)
