Over the weekend, huge crowds gathered in cities across the US for demonstrations against President Donald Trump's policies. Some online have been alleging that the American news channel MSNBC used old footage to exaggerate the scale of the protests. On X, Elon Musk's AI chatbot Grok claimed that the footage shown was from 2017. But Grok's claims were false: analysis shows the footage shared by MSNBC was indeed taken at a "No Kings" protest in Boston on October 18, 2025, as FRANCE 24's Charlotte Hughes explains.