A powerful car bomb killed 10 people in Pakistan after exploding outside the paramilitary security forces' headquarters. Before detonating their vehicle in the southwestern city of Quetta, six attackers who were inside the car stepped outside and engaged troops in an intense shootout, police said. People living in the area said the blast was so powerful it was heard from miles away. Image: No group immediately claimed responsibility for the bombing. Pic: AP Dozens were also wounded and taken to