Iranian political dissident Ibrahim Yazdi waves to supporters after returning to Iran from the U.S. at Mehrabad airport in Tehran, Saturday, April 20, 2002. Yazdi, 70, returned to Iran in April after nearly 18 months in the United States for cancer treatment. His immediate arrest was expected. So far, however, he's only faced grillings in the Revolutionary Court. He believes conservatives are undergoing a fundamental reshaping. If moderate forces prevail, Iran could be spared serious political upheaval.(AP Photo/Vahid Salemi)