large grassy area near the Washington Monument

large grassy area near the Washington Monument. There are American flags on poles along the base of the monument. A group of people on horseback are visible on the far side of the grassy area. A man is walking in the foreground. The camera pans to the right to show other people walking on the grass, as well as buildings in the background. The camera continues to pan to the right and shows a large crowd of people marching in the distance, carrying signs.