Philadelphia January 29, 2019 7:45 am Mysterious Overnight Boom A loud boom woke people in South Philadelphia, New Jersey and beyond early Tuesday. Police say they recieved reports of the loud sound, but do not yet know the cause. US & World Videos 2:26 Pro-Palestinian protest and encampment continues at Drexel University 2:44 Mayor Parker announces city workers will return to office full-time in the summer 25:15 WATCH: Mayor Cherelle Parker announces all city workers will return to office full-time this summer 1:55 Penn students graduate amid extra security after an academic year full of unrest 11:16 Another campus protest in Philly: The Lineup