SLIDESHOW: The worst hostage crises
A special bus carries six terrorists and 41 hostages, among them 11 oil ministers from OPEC, to the Vienna airport, Dec. 22, 1975. At left, terrorist, presumably "Carlos", a Venezuelan. The six terrorists who had taken over the OPEC headquarters and held 41 people hostage drove to the airport and boarded a DC9 aircraft they had commanded to fly them to Algeria. (Bernhard Frye/AP Photo)
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