Washington DC June 5, 2023 4:50 pm How sonic booms happen Sonic booms occur when an object flies faster than the speed of sound, which is about 750 mph. Storm Team4 Meteorologist Amelia Draper explains. Local 1:34 Protesters gather outside fenced-in GW graduation on National Mall 2:14 Crews prepare to move cargo ship that toppled Key Bridge 1:52 GW graduation ceremony on National Mall surrounded by security barriers amid protest concerns 0:36 Dali cargo ship to be moved at high tide Monday morning 2:17 Man shot, DC officer stabbed in mental health crisis call