A series of coordinated blasts hit Shi'ite districts across Baghdad and south of the Iraqi capital on Tuesday, killing at least 50 people.<br /> <br />Another 160 people or more were wounded, according to hospital officials.<br /> <br />The attacks come on the 10-year anniversary of the U.S.-led invasion that ousted Saddam Hussein.<br /> <br />Tuesday's car bombs exploded near a busy Baghdad market, close to the heavily-fortified Green Zone, and in other districts across the city.<br /> <br />A young bus driver named Ali witnessed one of the blasts.<br /> <br />(SOUNDBITE) (Arabic) BUS DRIVER, ALI, SAYING:<br /> <br />"The blast happened suddenly. One of the passengers who was sitting beside me was seriously wounded because of shrapnel. My assistant was also wounded. He was taken to hospital."<br /> <br />A decade after U.S. and Western troops swept into Iraq, the country still struggles with a stubborn insurgency, sectarian friction and political instability.<br /> <br />Sunni Islamist insurgents linked to al Qaeda have stepped up
