This episode's headline: Impeachment Inquiry; Showdown; Conversation - Perspectives. ANCHOR: JIM LEHRER; GUESTS: REP. GEORGE NETHERCUTT, [R] Washington REP. ZACH WAMP, [R] Tennessee;REP. CHAKA FATTAH, [D] Pennsylvania; REP. GENE TAYLOR, [D] Mississippi; VLADISLAV JOVANOVIC, U.N. Ambassador, Yugoslavia; BUJAR BUKOSHI, Kosovo Albanian Leader; WILLIAM F. BUCKLEY, Editor-at-Large, National Review;CORRESPONDENTS: MARGARET WARNER; PHIL PONCE; KWAME HOLMAN; ELIZABETH ARNSWORTH;CHARLES KRAUSE; MARGARET WARNER