This episode's headline: Deadly Tremor; Mad Cow; Paradox of Choice; Shields & Brooks; Conversation. ANCHOR: JIM LEHRER; GUESTS: FARZADNAIEM; PHILIP SENG; MICHAEL HANSEN; DAVID BROOKS; MARK SHIELDS; HOWARD BLUM;CORRESPONDENTS: KWAME HOLMAN; RAY SUAREZ; SPENCER MICHELS; MARGARET WARNER; GWEN IFILL; TERENCE SMITH; KWAME HOLMAN