PORTLAND, Maine (AP) — Hundreds of striking employees at one of the U.S. Navy’s biggest shipbuilding contractors voted Saturday to approve a deal with Bath Iron Works, ending a weeklong strike. Members of the Bath Marine Draftsmen’s Association ratified a new four-year collective bargaining agreement that goes into effect immediately, the shipyard said. Approval followed an hourslong union meeting at a local high school. The Bath Marine Draftsmen’s Association is affiliated with the United