Listen in on a debate of the events that turned World War II allies into Cold War rivals, as featured on the weekly CNN program "Postscript" -- which accompanies the COLD WAR series.

CNN World Affairs Correspondent Ralph Begleiter, Russian historian Vladislav Zubok, American scholar Thomas Blanton and former U.S. Assistant Secretary of State John Bolton consider if the allies realized that their decision to force Soviet troops from Iran in 1946 had an impact on global diplomacy for decades to come.

Dr. Vladislav Zubok is one of the leading historians of the Cold War and the author of "Inside the Kremlin's Cold War." He has studied extensively in Soviet and American archives and has taught classes on the Cold War at Amherst College, Ohio University in Athens and Stamford University. In 1993, Zubok was employed by the Kennan Institute for Advanced Russian Studies in Washington, D.C., and since then has worked at the Norwegian Nobel Institute in Oslo and is now a fellow at the National Security Archive in Washington.

Thomas Blanton is executive director for the National Security Archive in Washington, D.C. The NSA is a non-governmental research institute providing information from U.S. government and official archives for scholars, journalists, members of Congress, lobbyists and others. Their research teases out documents still classified to give a complete picture of what really happened.

John Bolton is senior vice president of the American Enterprise Institute for Public Policy Research. He was assistant secretary of state for international organization affairs during the Bush administration -- during which he formulated Washington's U.N. policy for the Middle East, Central America and other trouble spots.