FILE - This image made from security video provided by the Bulgarian Interior Ministry on Thursday, July 19, 2012 purports to show the unidentified bomber, center, with long hair and wearing a baseball cap, at Burgas, Bulgaria airport on Wednesday, July 18, 2012. Bulgarian Prime Minister Boiko Borisov said Tuesday, July 24, 2012 a sophisticated group of conspirators were involved in the suicide bombing that killed five Israelis and a Bulgarian bus driver, and that they spent a month in the country before the attack. (AP Photo/Bulgarian Interior Ministry)
