NEW : Ghannouchi calls Ben Ali 's return ` a victory for the people of Tunisia and an opportunity to build new democratic institutions' Military manning checkpoints in the streets of the Tunisian capital . Ben Ali welcomed in Jeddah by the king of Saudi Arabia .
NEW : Ghannouchi calls Ben Ali 's return `` impossible '' NEW : Army appears to be wielding the most power . Military manning checkpoints in the streets of the Tunisian capital . Ben Ali welcomed in Jeddah by the king of Saudi Arabia .