FILE - In this Jan. 16, 1979 file picture, Shah Mohammad Reza Pahlavi and Empress Farah walk on the tarmac at Mehrabad Airport in Tehran to board a plane to leave Iran. The popular revolt against the shah raised alarm bells in the West, which saw the shah as a trusted ally and counterweight to hard-line Arab regimes and Palestinian radicals. The face of the revolution was Ayatollah Ruhollah Khomeini, whose demeanor, vehemently anti-American rhetoric and stern interpretation of Islam challenged not only Western interests but also Western values. (AP Photo)