Depicting a trek along one of the longest routes in the US - the 2,180-mile Appalachian Trail - would be taxing enough for a sprightly young actor, let alone a couple of septuagenarians.But Hollywood veterans Robert Redford and Nick Nolte did just that for upcoming comedy drama A Walk In The Woods, based on author Bill Bryson's 1998 book about his attempt to complete the famous route from Georgia to Maine."You'd go up 100ft and they'd say, 'OK cut', then you'd do it again - and you'd do...
