Washington, D.C.'s cherry trees are known around the world for their blossoms.The beautiful flowers brighten up many areas along the Potomac River each spring.But this year as the blossoms go through peak bloom, the District of Columbia government is trying to stop visits to the Tidal Basin, where many of the trees grow.D.C. officials have appealed to the United States National Park Service to close off the area as part of efforts to help stop the spread of the new coronavirus.Officials say the expected crowds make it impossible for people to stay at least two meters from one another as health experts have advised.The Metropolitan Police Department closed several streets, bridges and traffic circles in the area Sunday morning, trying to limit the usual crowds.The cherry trees reached full bloom on Friday and should stay that way for about 10 days."It's getting weirder and weirder," said National Park Service spokesman Mike Litterst about his efforts to stop people from visiting.