Right now, Hurricane Erin is churning offshore, pushing waves over dunes and spilling water across some roads. That’s not unusual along N.C. Highway 12 in the Outer Banks. But a new collaborative study finds that some of the very efforts to protect this road whenever a major storm comes through may actually be making Ocracoke more vulnerable in the long run. WRAL climate reporter Liz McLaughlin has been digging into the findings.