This episode's headline: Life Support; Shields & Brooks; Dangerous Job; In Memoriam. ANCHOR: JIM LEHRER; GUESTS: BILL ALLEN; REP. DAVE WELDON; DAVID BROOKS; MARK SHIELDS; CORRESPONDENTS: KWAME HOLMAN; RAY SUAREZ; SPENCER MICHELS; MARGARET WARNER; GWEN IFILL; TERENCE SMITH; KWAME HOLMAN