This episode's headline: In Harm's Way; Gergen & Shields. The guests include ANTONIA RADOS, Austrian Television; PATRICK COCKBURN, The Independent; DAVID GERGEN, U.S. News & World Report; MARK SHIELDS, Washington Post; CORRESPONDENTS: BRENT SADLER; KWAME HOLMAN. Byline: In New York: ROBERT MacNeil; In Washington: JAMES LEHRER