People take part in a rally at Daley Plaza in Chicago, the United States, on June 19, 2020. Thousands gathered in downtown Chicago and at several other events throughout Chicago on Friday to mark Juneteenth, commemorating the end of slavery in the United States. (Photos: Chris Dilts/Xinhua)

A man holds a placard during a rally at Daley Plaza in Chicago, the United States, on June 19, 2020. Thousands gathered in downtown Chicago and at several other events throughout Chicago on Friday to mark Juneteenth, commemorating the end of slavery in the United States.

A man holds a placard during a rally at Daley Plaza in Chicago, the United States, on June 19, 2020. Thousands gathered in downtown Chicago and at several other events throughout Chicago on Friday to mark Juneteenth, commemorating the end of slavery in the United States.

A placard is seen during a rally at Daley Plaza in Chicago, the United States, on June 19, 2020. Thousands gathered in downtown Chicago and at several other events throughout Chicago on Friday to mark Juneteenth, commemorating the end of slavery in the United States.

People take part in a rally at Daley Plaza in Chicago, the United States, on June 19, 2020. Thousands gathered in downtown Chicago and at several other events throughout Chicago on Friday to mark Juneteenth, commemorating the end of slavery in the United States.