The attack, planned by Ali Hassan Salameh, was carried out by a group of two men and two women who pretended to be two couples: the group’s leader Ali Taha Abu Snina, plus Abed al-Aziz Atrash, Rima Tannous and Theresa Halsa. They were armed with two handguns, two hand grenades and two belts of explosives. Twenty minutes out of Vienna, the hijackers entered the cockpit. "As you can see," Captain Levy told the 90 passengers, "we have friends aboard." He concealed from the hijackers that his wife was a passenger on the plane.