'Operation Sentinel': the anti-terror force patrolling French cities

Set up in the wake of the Charlie Hebdo attacks in January 2015, military officers from Operation Sentinel have been patrolling streets and sites all over France, becoming part of the country's urban scenery. In 2017 Operation Sentinel was reorganised and redeployed in an effort to make it more versitile, flexible and mobile. FRANCE 24's Karim Hakiki reports from Lyon.