This photo released by the Syrian official news agency SANA, shows Syrian fire fighters extinguishing burning cars after a huge explosion shook the Sabaa Bahrat Square, one of the capital's biggest roundabouts, in Damascus, Syria, Monday, April. 8, 2013. A car bomb rocked a busy residential and commercial district in central Damascus, killing over a dozen people, wounding at least 50 and causing heavy material damage, a Syrian government official said. (AP Photo/SANA) ( Mideast Syria )