Footage has emerged of armed fighters opposed to the continuing 42-year-rule of Muammar Gaddafi seizing a border post along Libya's national boundary with Tunisia.br br Gaddafi's troops initially fled into Tunisia, but later returned to Libya, said Tunisian state TV.br br Waheed Burshan, a Tunis-based political activist, tells Al Jazeera's Nick Clark about the scene at the Wazin border crossing.