Security at G7 summit aims to keep delegates safe and protests far

The world’s most powerful leaders are scheduled to converge in Kananaskis, a tiny Alberta tourist village in the Canadian Rockies, for a three-day summit starting Sunday, testing security services tasked with keeping everyone safe. Airspace restrictions kick in Saturday. Royal Canadian Air Force helicopters have been flying low-level nighttime missions in the area for a week now. And this spring, more than 200 local kids picked buffaloberry bushes around Kananaskis, to keep the bears away.