Who is spying on whom in the post-Cold War world? Listen in to a debate on that subject, as featured on the weekly CNN program "Postscript" -- which accompanies the COLD WAR series.

CNN World Affairs Correspondent Ralph Begleiter, retired U.S. Lt. Gen. William Odom, American scholar Timothy Naftali and intelligence expert David Isby consider the direction espionage has now taken, especially among friendly nations -- in a world where allegiances have grown more blurred.

Odom is director of National Security Studies for the Hudson Institute. He was director of the National Security Agency from 1985 to 1988, and in that capacity was an adviser to the Joint Chiefs of Staff, secretary of defense and director of Central Intelligence.

Naftali teaches at the University of Virginia. He is working on a book on U.S. counterespionage and is an Olin Fellow in International Security Studies at Yale University.

Isby is a correspondent for Jane's Intelligence Review, a leading open-source publication on current and potential threats. He is the author of 16 books and more than 250 articles on national security and intelligence matters.