Turkish police officers, firefighters and forensic experts work on September 20, 2011 the site of powerful bomb explosion that wounded at least 15 people in the center of the Turkish capital Ankara. The blast, which occured near the Cankaya district administration offices, blew out windows of shops and offices in the surrounding area, damaged cars and sparked a fire which was later put out by firefighters at the scene. The blast comes at a time when Turkish officials threatened to launch an incursion by its ground forces against Kurdish rebel bases operating in northern Iraq after a recent spate of attacks. AFP PHOTO / STR (Photo credit should read -/AFP/Getty Images)
