Joe Torre, 75, left, and Kicky Clavell, 67, greet one another as their motorcade stops outside the VA Medical Center before a wreath laying ceremony, Monday, May 25, 2020, in the Brooklyn borough of New York. (Photo: AP)

NEW YORK, June 1 (Xinhua) -- The number of COVID-19 cases in the United States topped 1.8 million on Monday, reaching 1,804,206 as of 5:44 p.m. (2144 GMT), according to the Center for Systems Science and Engineering at Johns Hopkins University.