This episode's headline: Term Limits; Fish Story; FDA's Future. The guests include CLYDE WELLS, Premier, Newfoundland; WILLIAM BURKE, University of Washington; MATTHEW GIANNI, Greenpeace; CORRESPONDENTS: KWAME HOLMAN; JUDY ASLETT; CHARLAYNE HUNTER-GAULT. Byline: In New York: ROBERT MAC NEIL; In Washington: JAMES LEHRER