Abu Nidal, one of the world's most infamous terrorists, moved to Baghdad late last year and obtained the protection of President Saddam Hussein, according to intelligence reports received by United States and Middle Eastern government officials. The reports have raised questions about whether Iraq is pushing to establish a terrorism network, American and Middle Eastern officials say. Abu Nidal, a brutal survivor of the Middle East's terrorist wars dating to the 1970's, had been living in Cairo for more than a year, according to Middle Eastern government officials who say they have information from inside his organization. While intelligence information...