The RCAF’s Snowbirds and the French Air Force’s Patrouille de France teamed up for two passes over Parliament Hill Tuesday. The flyby marked Canada’s sesquicentennial went ahead Tuesday morning after several delays. It was expected at 9.45 a.m. but finally passed over about 11.20 a.m. thrilling the waiting crowd. This was also the day that Ottawa saw a large evacuation of its downtown because of a gas leak.