Teams in eastern Canada have called off an “extensive” six-day air and ground search of a rugged park for a missing Australian hiker. The Royal Canadian Mounted Police (RCMP) said this week it had suspended operations after an effort involving dogs, 100 people, aircraft and ground crews yielded “no new information” in the whereabouts of Denise Ann Willams. Williams, 62, has not been heard from since mid April, when she ventured into the Cape Breton Highlands national park. The park, which spans more than 360 square miles, is one of the largest swaths of protected wilderness in the province of