France is currently monitoring 12,000 people for signs of "radicalisation of a terrorist nature". It has announced a new strategy to tackle the problem - but will it help keep the country safe from attacks? reports the BBC.
When you first meet her, Marie has a cautious, slightly untrusting manner. She speaks slowly, sketching thin outlines of her story - how she was radicalised, how she escaped - with challenge and vulnerability mixed together in her eyes.
The threat from those who recruited her is still very real and we've disguised her identity to protect her; Marie is not her real name.
"I was forced to pray," she said. "They tried to get me to adhere to their extremist religion, but I didn't take to it at all, so in punishment I was sexually assaulted."
Off camera, she confirms that she was raped.
"You have to stay silent," she says. "It's like playing cat and mouse - the mouse is in a very small box and the cat is ready to pounce at any time.
"You know that if you don't go along with them there will be sanctions."
The question of how to prevent people like Marie from falling under the influence of violent radical Islamist groups - and how to help them when they do - is something France has struggled with.
Pressure to combat extremist ideology grew after several major terrorist attacks here in 2015 and 2016, and recent military success against jihadist groups in Iraq and Syria - and the return of fighters to France - has turned the spotlight on radical networks at home.
Alongside the internet, prisons have been seen as a prime recruiting ground.
Marie says she was recruited in prison while serving time for an unrelated offence. "I was an easy target," she said. "I was far from my relatives, and I was lost, really lost."
The new deradicalisation strategy announced by the government includes the segregation of radicalised prisoners in separate wings.
But critics say it could prove dangerous, surrounding jihadist leaders with a hand-picked audience of potential recruits.