As of this writing, the three people responsible (two gunmen and a getaway driver) for the terrorist attacks at the offices of Charlie Hebdo are still at large.
Witnesses say the terrorists spoke perfect French and claimed that they were with al Qaeda in Yemen.
Unlike the so-called "lone wolf" incidents such the shootings in Ottawa last October and the hostage situation last month in Sydney, this operation appears to have been carried out with more planning and sophistication. Indeed, the official magazine of al Qaeda in Yemen, Inspire, included Charlie Hebdo editor Stephane Charbonnier as part of its 2013 "Wanted Dead or Alive for Crimes Against Islam" list.
Of course, if the terrorists were fluent in French that means they were either born in France or emigrated there when they were very young.