Boston August 16, 2018 6:50 pm Tracking Cape Cod Shark Sightings and Encounters There have been at least three great white shark encounters in the last three years off Cape Cod. US & World Videos 3:05 100 protesters detained at Northeastern University 2:39 Community mourns police sergeant killed on duty 2:50 Community mourns Billerica police sergeant killed on duty 4:32 Anti-war protester at Northeastern speaks amid arrests: ‘We are peaceful students' 10:42 Multiple people arrested as police clear campus encampments