September 24, 2016 1:55 pm President Barack Obama During Dedication of National Museum of African American History The president was helping to officially open the National Museum of African American History and Culture at an outdoor ceremony on the museum grounds. Local 0:22 A look at northern lights chances in the DC area 1:13 ‘Gross negligence': Dog owners sue after deadly District Dogs flooding 0:28 Man found shot to death in MGM National Harbor parking lot 1:47 Montgomery County police offer antitheft software update for Hyundai owners 1:37 ‘Irreplaceable void in our hearts': Vigil held for 3-year-old girl killed in exchange of gunfire