> French Prime Minister Manuel Valls wants a promotion to president. He's the frontrunner for the Socialist nomination, but his party has a security problem.>>
>> Voters think the government hasn't done enough to tackle the Islamist militants responsible for over 230 killings since the beginning of 2015.
Security expert Francois-Bernard Huyghe.>> Thousands of French people with French nationality were going as foreign fighters to Syria and Iraq. They'll probably return one day having learned how to use a Kalashnikov. And we have a lot of people who are attracted by jihadism.>> 130 of the deaths took place in coordinated strikes across Paris on the 13th of November last year.
>> This was the site of the evening's deadliest attack. I'm Reuters reporter Mia Womersley outside the Bataclan Music Hall where Islamic State militants burst in through the main entrance, sprayed automatic gunfire into the crowds, and gunned down 90 people in a siege that lasted over two hours.>> The militants had French passports and managed to travel freely.
Huyghe, though, says it's not just about policing borders.>> The enemy is already within.>> But also infiltrating the country's many extremist networks.>> You don't become radicalized into violent extremism just by watching Internet. You need a human network to guide you, to give you advice. If you're looking on Google, I want to go to Syria, you will certainly be led to anti-radicalization sites.
So you need a kind of initiation to practice safer encrypted conversation. You need a brother.>> Right-wing presidential candidate Francois Fillon has declared a war on radical Islam. Support for far-right rival Marine Le Pen is on the up. Valls says France must show the world that Islam and democracy can coexist.
He has just five months to convince the electorate.