This episode's headline: Scorched; Taxing Assignment; An Eye on Arms; Terrorist or Patriot?. The guests include In Columbia: Gov. DICK RILEY, Democrat, South Carolina; In Washington: NORMAN ORNSTEIN, Political Scientist; THOMAS COCHRAN, Test Ban Advocate; RICHARD PERLE, Defense Department; REPORTS FROM NEWSHOUR CORRESPONDENTS: TOM BEARDEN, in North Carolina; SPENCER MICHAELS, in San Francisco. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: JIM LEHRER, Associate Editor; JUDY WOODRUFF, Correspondent