Mass demonstrations erupted on Saturday in front of Copenhagen City Hall, as Danish protesters voice opposition to the U.S. administration's threat to acquire Greenland – by force if necessary. Thousands of Danes have signaled their intent to join marches and rallies via social media. The protests follow Trump's warning on Friday that he "may impose tariffs" on countries opposing his plans to take over Greenland, an autonomous territory of Denmark. CGTN brings you the latest updates.