"If ever France needed to unify it's now."

France has lived through a traumatic week. Seventeen people died during three days of deadly attacks. As we went to air Paris was bracing itself for huge march in the name of national unity. Thousands of soldiers and police were guarding the route, and snipers placing themselves on rooftops across the city. For BH, Emma Jane Kirby sent us her reflections on how the chaos of the last week has affected the French psyche.