David Martin, national security correspondent for CBS News covers the State Department and Pentagon. His stories appear on the "CBS Evening News," "60 Minutes," and "48 Hours." Prior to joining CBS in 1983, he worked in various positions for Newsweek and the Associated Press. He has written two books: Best Laid Plans: The Inside Story of America's War Against Terrorism (1988) and Wilderness of Mirrors (1980) about the CIA and KGB.