Sean Barrett has seen a lot in his four years at Harvard. He’s consistently been among the top Crimson finishers at various regional meets since his freshman year. He’s seen coaches come and go. He’s competed with and against formidable tracksters across New England and beyond. Now he’s getting ready to embark on a journey that will show him more about himself and his world than he could ever imagine. Barrett has joined the U.S. Marine Corps and has committed, initially, to serving four years. It’s a decision that seems almost incongruous for a bright athlete from the Ivy League....