WASHINGTON, DC - SEPTEMBER 01: U.S. flags are seen through the windows of the soon-to-be-opened Smithsonian National Museum of African American History and Culture as they are flown at the ground of Washington Monument September 1, 2016 in Washingotn, DC. The museum was established by Act of Congress in 2003. It is the only national museum devoted exclusively to the documentation of African American life, history, and culture. A dedication ceremony will be held to mark the grand opening of the museum on September 24. (Photo by Alex Wong/Getty Images)