I don't know what actually happened, but the current reporting is that he was turned back for other reasons: U.S. Says Decision to Turn Back French Scientist H

I don't know what actually happened, but the current reporting is that he was turned back for other reasons: U.S. Says Decision to Turn Back French Scientist Had Nothing to Do With Trump The Department of Homeland Security said the academic was denied entry because he had 'confidential' data from an American lab, not because of his views on the president’s policies. https://www.nytimes.com/2025/03/21/world/europe/us-france-scientist-entry-trump.html https://www.nytimes.com/2025/03/21/world/europe/us-france-sc... (https://archive.is/z7mhZ https://archive.is/z7mhZ)