A newly completed one-mile trail invites walkers to get their steps in while discovering the Mahoning Valley’s aviation history. The Air Heritage Trail, a $500,000 project, will be presented to the public during a ribbon cutting and reception at 3 p.m. Friday. Entrance to the path is located at 4300 King Graves Road, Vienna, between the Youngstown-Warren Regional Airport and the Youngstown Air Reserve Station’s new main gate. The path is constru…