On a Monday morning in Nice, France, customers at a bank grow agitated as they wait to make their deposits. The short line grows into a small crowd. The vault door is stuck. And as the hours tick by, the door won't budge. Not even the manufacturer can get it open. In the end, frustrated employees take a jackhammer to the wall and make a hole big enough to peek through. Instead of neatly sealed deposit boxes, the employees find scattered papers, muddy tools, and an inscription on the wall that reads: "sans armes, ni haine, ni violence."