France's interior minister said the raids stopped a "long-planned" assault on French soil.
The French capital's tourism industry has not recovered since the deadly attacks.
The threat from within Europe appears greater than that from ISIS's central command.
Those who join ISIS are often swayed by the sense of belonging or excitement they feel a caliphate offers.
Bangladeshi police also arrested a University of Toronto student.
"Listen Putin, we will come to Russia and will kill you at your homes," ISIS said.
Nearly half a million Google searches a month return Islamist extremist material.
Police named the first attacker as 19-year-old Adel Kermiche, who was wearing an electronic tag.
The Christian and Muslim leaders of French town near Rouen lived together in harmony, community leader says.
The Nice murderer Mohamed Lahouaiej Bouhlel was inspired from abroad over social media.
Social media has inadvertently created platforms that allow poisonous ideas to spread.
One in five could imagine performing torture themselves.
Larossi Abballa acted on Abu Mohammad al-Adnani's call for lone wolf attacks during Ramadan.
She could soon be charged in connection with the deadliest mass shooting in modern U.S. history.
Larossi Abballa had previously been convicted for jihadi links, sources close to the investigation say.
Authorities are attempting to stop a series of attacks on minority groups in the country.
"Terrorists must not be permitted to provide for their designated beneficiaries through their crimes," says U.S. Attorney Eileen Decker.
ISIS teachers neglect subjects that used to be taught, such as science, mathematics, art and music. Instead, children are taught how to fight in jihad.
Washington pledged a further 200 troops to Baghdad in the battle for Mosul on Monday.