This episode's headline: Fighting on Foot; Conversation. The guests include LT. GEN. WILLIAM ODOM, U.S. Army [Ret.]; REP. LES ASPIN, Chairman, Armed Services Committee; SEN. WILLIAM COHEN, [R] Maine; EDWARD LUTTWAK, Military Analyst; CORRESPONDENTS: NIK GOWING; CHARLAYENE HUNTER-GAULT. Byline: In New York: ROBERT MacNeil; In Washington: JAMES LEHRER