Paris dazzles with a rainy Olympics opening ceremony on the Seine River

A hot-air balloon brought an Olympic ring of fire into a rainy sky and singer Celine Dion belted from the Eiffel Tower as Paris kicked off its first Summer Olympics in a century Friday, with a four-hour-long, rule-breaking opening ceremony that unfurled along the Seine River.

On-and-off showers did not seem to hamper the enthusiasm of the athletes. Some held umbrellas as they rode boats down the river in a showcase of the city's resilience as authorities investigated suspected acts of sabotage targeting France's high-speed rail network.

With the ambitious ceremony, the stakes for France were immense. Dozens of heads of state and government were in town, and the world was watching as Paris turned itself into a giant open-air theater. Along the Seine, iconic monuments became stages for dancers, singers and other artists.

That included the Louvre Museum, near...