Standing in the town that sheltered thousands of stranded Americans after the September 11 attacks, former Canadian prime minister Jean Chretien marked the 25th anniversary on Friday with a pointed message for the US: “Never mistake our generosity for weakness.”The 92-year-old former leader, who was prime minister at the time of the attacks, drew a standing ovation after telling his “American friends” that Canadians may be tolerant and kind but “we bow to no one”. US Ambassador to Canada Pete...