This episode's headline: On the Brink; Executive Excess; Inspecting Iraq. ANCHOR: JIM LEHRER; GUESTS: PAUL MERRION; JIM HOAGAND; KATRINA VANDEN HEUVEL; ANDREW KOHUT; CORRESPONDENTS: KWAME HOLMAN; RAY SUAREZ; SPENCER MICHELS; MARGARET WARNER; GWEN IFILL; TERENCE SMITH; KWAME HOLMAN