French police raided the offices of Elon Musk's social media network X on Tuesday and prosecutors ordered the tech billionaire to face questions in April in a widening investigation, amid growing scrutiny of the platform by authorities across Europe. France's raid and the summoning of Musk — which could further increase tensions between Europe and the U.S. over big tech and free speech — are linked to a year-long investigation into suspected abuse of algorithms and fraudulent data extraction by