The timestamp defense: Why publication dates are now journalism’s most critical metadataIn May 2023, an AI-generated image of smoke rising from the Pentagon briefly moved financial markets, wiping 0.3% off the S&P 500 in minutes. [Bloomberg](https://www.bloomberg.com/news/articles/2023-05-22/fake-ai-photo-of-pentagon-blast-goes-viral-trips-stocks-briefly) By October 2024, fake images of Hurricane Helene victims—crying children, dramatic rescues—garnered millions of views and were shared by sitting senators. ...