This episode's headline: The 9-11 Plot; Oil for Food: The Uninsured. ANCHOR: MARGARET WARNER; GUESTS: THOMAS KEAN; LEE HAMILTON; PAUL VOLCKER; SUSAN DENTZER; CORRESPONDENTS: ALEX THOMPSON; KWAME HOLMAN; RAY SUAREZ; SPENCER MICHELS; MARGARET WARNER; GWEN IFILL; TERENCE SMITH; KWAME HOLMAN