S1, E1: Interstate 95, one of the longest U.S. highways, spans 3,100 km from Canada to Miami, crossing 15 states and major East Coast cities. It’s the second deadliest road, with thousands of accidents yearly. Among its users are thrill-seekers like Juvy, 33, a member of the South Florida Quad acrobatics gang, who risk their lives in dangerous, helmetless highway stunts, despite recent fatal accidents.