This episode's headline: Attack in Parliament; Assisted Suicide; High Speed Takes; Campaign Agenda. ANCHOR: JIM LEHRER; GUESTS: REP. DAVE WELDON, [R] Florida; DAVID SCHUMAN, Deputy Attorney General, Oregon; HARRY GILMORE, Former U.S. Ambassador, Armenia; SHERMAN ALEXIE, Author/Screenwriter; ELAINE CHAO, Heritage Foundation; ROBERTO SURO, Washington Post; KAY JAMES, Heritage Foundation; CORRESPONDENTS: RAY SUAREZ; TERENCE SMITH; GWEN IFILL; KWAME HOLMAN; SPENCER MICHELS; ELIZABETH FARNSWORTH; MARGARET WARNER; ROGER ROSENBLATT; ROBERT PINSKY; FRED DE SAM LAZARO