France’s biggest geek get-together started with a bang this year. For its 10th anniversary, the VivaTech trade show took to the Champs-Elysées, billing the installation as "Europe's largest open-air technology experience."

France’s biggest geek get-together started with a bang this year. For its 10th anniversary, the VivaTech trade show took to the Champs-Elysées, billing the installation as "Europe's largest open-air technology experience."