Gary Sick, senior research scholar at Columbia University, spoke to students April 15 in the Kerr Lecture Hall. Sick served on the National Security Council staff under Presidents Ford, Carter and Reagan. He was the principal White House aide for Iran during the Iranian Revolution and the hostage crisis and is the author of two books on U.S.-Iran relations, in addition to several other edited books and articles dealing with U.S. Middle East policy. Mr. Sick is a captain (ret.) in the U.S. Navy, with service in the Persian Gulf, North Africa and the Mediterranean.