This episode's headline: Pentagon Promotion; 1 Year Later; Eye on the Ball. The guests include WILLIAM PERRY, Secretary of Defense-designate; SEN. JOHN GLENN, [D] Ohio; SEN. WILLIAM COHEN, [R] Maine; REAR ADM. EUGENE CARROLL [Ret.], Center for Defense Information; MICHAEL BESCHLOSS, Historian; DORIS KEARNS GOODWIN, Presidential Biographer; ARTHUR SCHLESINGER, Historian; WILLIAM BENNETT, Former Reagan/Bush Official; DERRICK BELL, Law Professor; RICHARD REEVES, Political Scientist; CORRESPONDENT: ANNE TAYLOR FLEMING. Byline: In New York: ROBERT MacNeil; In Washington: CHARLAYNE HUNTER- GAULT