WASHINGTON, DC - SEPTEMBER 24:  U.S President Barack Obama and First Lady Michelle Obama are join up with the Bonner Family to ring the onstage bell. during the opening ceremony of the Smithsonian National Museum of African American History and Culture on September 24, 2016 in Washington, DC. The museum is opening thirteen years after Congress and President George W. Bush authorized its construction. (Photo by Olivier Douliery-Pool/Getty Images)