People spend their afternoon by the Lincoln Memorial Reflecting Pool in Washington D.C., the United States, June 21, 2020. (Photo by Ting Shen/Xinhua)

A girl spends her afternoon on the National Mall in Washington D.C., the United States, June 21, 2020. (Photo by Ting Shen/Xinhua)

People spend their afternoon by the Lincoln Memorial Reflecting Pool in Washington D.C., the United States, June 21, 2020. (Photo by Ting Shen/Xinhua)

People spend their afternoon by the Lincoln Memorial Reflecting Pool in Washington D.C., the United States, June 21, 2020. (Photo by Ting Shen/Xinhua)

A boy rides a scooter by the Lincoln Memorial Reflecting Pool in Washington D.C., the United States, June 21, 2020. (Photo by Ting Shen/Xinhua)

People spend their afternoon on the National Mall in Washington D.C., the United States, June 21, 2020. (Photo by Ting Shen/Xinhua)