France has raised its terror alert level to its highest tier after the recent security incident in a concert hall in Moscow. It comes months before Paris is set to host the Summer Games, which are expected to draw millions of visitors to the country. International SOS' lead security analyst Rory Keith and our Global Director for Security, Assistance James Waddington offer insights into why France has taken the decision and explain what it means for residents and people who may be travelling there on business.