This episode's headline: Operation Allied Force; Great Terror; Breaking 10,000; Hero in Wartime. ANCHOR: JIM LEHRER; GUESTS: ROBERT HUNTER, RAND; IVO DAALDER, Brookings Institution; MICHAEL McFAUL, Carnegie Endowment; BOB TURNER, International Rescue Committee; KAREN ABUZAYD, United Nations; LJUBICA ACEVSKA, Ambassador, Macedonia; GRETCHEN MORGENSON, New York Times; ROBERT PINSKY, Poet Laureate; CORRESPONDENTS: TOM BEARDEN; TERENCE SMITH; CHARLES KRAUSE; PHIL PONCE; MARGARET WARNER; KWAME HOLMAN; ELIZABETH BRACKETT; ELIZABETH FARNSWORTH