The US decision to remove 2,000 troops from Syria worries France, which has 200 special forces in areas wrested from IS by the Syrian Democratic Forces (SDF). US forces ferried supplies to French commandos, and helped evacuate French wounded. But the great dilemma is what to do with the 130 French jihadists held by the SDF (along with 770 from other countries). The SDF complains of the burden of guarding so many foreign jihadists, and wants France to repatriate its 130 nationals. The numbers could swell. Another 250 French jihadists are held in Iraq. Many of the detainees are women and children deeply implicated in terrorism. The French prison systems cannot cope with a massive influx of returning jihadists. And if they are tried, it could be difficult to find evidence against them. There are already 150 returnees in the prisons, with thirty due to be freed this year. French intelligence has repeatedly been unable to prevent terrorists on watchlists from staging attacks.