-On July 24, 1967, General de Gaulle was in Montreal, (Canada). Invited to City Hall by Mayor Jean Drapeau, the French president came out to the balcony to greet the crowd. While no speech was planned, de Gaulle took advantage of a forgotten microphone on the terrace to pronounce four words that went around the world: "Vive le Québec libre. This short film tells the story of this microphone. Installed in the morning by technicians, the mayor had insisted that it be removed, as no intervention was planned from the balcony. The microphone had been unplugged and stored in a corner of the terrace. That evening, when General de Gaulle insisted on speaking, a technician present at the event quickly reconnected the microphone. The French president then delivered a speech that he concluded with his famous phrase.