This episode's headline: On the Stand; Road Check. The guests include NINA TOTENBERG, National Public Radio; CONSTANTINE MENGES, Former National Security Official; SCOTT ARMSTRONG, National Security Analyst; LEE IACOCCA, Chairman, Chrysler Corporation; CORRESPONDENTS: PAUL ANTHONY; FRED DE SAM LAZARO; JUDY WOODRUFF. Byline: In New York: ROBERT MacNeil; In Washington: JAMES LEHRER