US First Lady Michelle Obama joins France's Carla Bruni-Sarkozy for a paparazzi-pulling visit to Strasbourg Cathedral on Saturday, diplomats said. As Western leaders converge on the eastern French city for a NATO summit, celebrity watchers will set their sights on the high-profile pair, whose style and personalities have grabbed world headlines. Obama and Bruni-Sarkozy will join other NATO leaders' partners for a midday visit of the Gothic jewel and a nearby art restoration centre, after touring a cancer research institute. Built from the 12th to 15th centuries, Strasbourg Cathedral was for centuries the tallest building in Christendom, with a north...