On July 19, 2012, a bomb on a bus taking Israelis from the airport in Sofia, Bulgaria, to their hotel at a Black Sea resort killed five of the tourists and the driver. Bulgarian officials said Tuesday that Hezbollah terrorists were behind the attack. (Impact Press Group via Associated Press)

On July 19, 2012, a bomb on a bus taking Israelis from the airport in Sofia, Bulgaria, to their hotel at a Black Sea resort killed five of the tourists and the driver. Bulgarian officials said Tuesday that Hezbollah terrorists were behind the attack. (Impact Press Group via Associated Press)