Thousands march in violence-hit Tunisian town Thousands of people protested for a fourth straight day Friday in the central town of Siliana demanding the governor quit, as political instability mounts in Tunisia two years after a revolution. Tunisia's main trade union UGTT called for a symbolic march a few kilometres (miles) towards Tunis which drew a crowd of several thousand, who took part on foot, in cars and on motorcycles. Images and soundbites