This episode's headline: Confronting Argentina; Time of Crisis; Dialogue. ANCHOR: JIM LEHRER; GUESTS: JOSEPH TULCHIN, Woodrow Wilson Center; CLAUDIO GROSSMAN, American University Law School; SUZANNE BILELLO, Freedom Forum; DORIS KEARNS GOODWIN, Presidential Historian; MICHAEL BESCHLOSS, Presidential Historian; HAYNES JOHNSON, Journalist/Author; SERGEI KHRUSHCHEV; STEPHEN GELERNTER, Author, ""Drawing Life""; CORRESPONDENTS: ELIZABETH FARNSWORTH; KWAME HOLMAN; DAVID GERGEN