TORONTO — It has been difficult for Canadian runner Sasha Gollish to concentrate on her usual preparation for this weekend's TCS Toronto Waterfront Marathon. Recent world events — most notably the surprise attack on Israel by Hamas nearly a week ago — have been on her mind. "I'm Jewish and there has been a lot of unrest for a long time, but in the last six days it has really been heightened. It's a privilege to know that you have safety in the ability to run," Gollish said. "So on Sunday, I'm