Police forensic, ambulances and security officials are seen after a suspected car bomb exploded in a busy street in the Turkish capital Ankara, Turkey, Tuesday, Sept. 20, 2011, wounding 15 people, authorities said. There was no immediate claim of responsibility, but the attack comes at a time when Kurdish rebels fighting for autonomy in southeastern Turkey have escalated their attacks on Turkish targets. The rebels carried out deadly bomb attacks in Turkish cities in the past.(AP Photo/Burhan Ozbilici)