This episode's headline: Big Chill?; End of an Era; Debating Reform; Political Wrap; Moving Man. ANCHOR: JIM LEHRER; GUESTS: ROY GODSON; STEPHEN COHEN; ARIEL COHEN; MARK SHIELDS; PAUL GIGOT; CORRESPONDENTS: KWAME HOLMAN; RAY SUAREZ; SPENCER MICHELS; MARGARET WARNER; GWEN IFILL; TERENCE SMITH; KWAME HOLMAN