A cyclist rides by the Lincoln Memorial at the National Mall in Washington D.C., the United States, June 12, 2021. (Photo by Ting Shen/Xinhua)

People visit the Lincoln Memorial at the National Mall in Washington D.C., the United States, June 12, 2021. (Photo by Ting Shen/Xinhua)

Tourists drive a paddle boat in the Tidal Basin at the National Mall in Washington D.C., the United States, June 12, 2021. (Photo by Ting Shen/Xinhua)

People spend time at the National Mall in Washington D.C., the United States, June 12, 2021. (Photo by Ting Shen/Xinhua)

People spend time at the National Mall in Washington D.C., the United States, June 12, 2021. (Photo by Ting Shen/Xinhua)