Iraqi Ramzi Yousef is the architect of the 1993 World Trade Center bombing, arrived in America on an Iraqi passport before fleeing after the attack on Pakistani papers. Abu Abbas is the masterminded the 1985 hijacking of the ocean liner Achille Lauro during which American retiree Leon Klinghoffer was murdered. U.S. troops captured Abbas in Baghdad last April 14. Abu Nidals terrorist gang killed 407 people, including 10 Americans, and wounded 788 more. He lived in Baghdad between 1999 and his mysterious shooting death in August 2002. After running an al Qaeda training camp in Afghanistan, Abu Musab al Zarqawi received medical care in Baghdad once the Taliban fell. He opened an Ansar al-Islam camp in northern Iraq and reportedly arranged the October 2002 assassination of U.S. diplomat Lawrence Foley in Jordan. Zarqawi is at large.