FILE - This image provided by the Bulgarian Interior Ministry on Thursday, July 19, 2012, shows a damaged bus following Wednesday's deadly suicide attack on the bus full of Israeli vacationers at the Burgas, Bulgaria airport parking lot. 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)
