This episode's headline: AIDS & Addicts; TOXIC WETLANDS. The guests include DR. DON DESJARLAIS, National Commission on AIDS; DR. HERBERT KLEBER, Office of National Drug Control Policy; MAYOR JOHN DANIELS, New Haven, Connecticut; ROBERT STUTMAN, Former Drug Enforcement Agent; CORRESPONDENTS: LEE HOCHBERG; TOM BEARDEN. Byline: In New York: CHARLAYNE HUNTER-GAULT; In Washington: JAMES LEHRER