FORT LAUDERDALE, Fla. — Dwayne Haskins was working on a second chapter for his young NFL career. The 24-year-old quarterback was spending time with Pittsburgh Steelers teammates, getting ready to compete for a starting job. That’s when his life was cut short. Haskins was killed early Saturday morning when he was hit by a dump truck while he was walking on a South Florida highway. Florida Highway Patrol spokeswoman Lt. Indiana Miranda said Haskins was pronounced dead at the scene. “He was attempting to cross the westbound lanes of Interstate 595 when there was oncoming traffic,” Miranda said in an emailed statement. Miranda didn’t say why Haskins was on the highway at the time. The accident caused the highway to be shut down for several hours, and Miranda said it’s “an open traffic homicide investigation.” A 2019 first-round draft pick by Washington, Haskins was released by the team after going 3-10 over two seasons. He was signed by Pittsburgh as a developmental QB, but he didn’...