French President Francois Hollande arrived on Thursday at the Police Headquarters in Paris to address the police and the military on the anniversary of the Charlie Hebdo attacks.
On 7 January 2015, two French-born brothers killed 11 people inside the building where Charlie Hebdo operated, as well as a Muslim policeman outside.
Over the next two days, an accomplice shot a policewoman to death, then stormed a kosher supermarket, killing four hostages.
All three gunmen died.
France remains under a state of emergency following extremist attacks in November last year.