This episode's headline: Fight Against AIDS; Pressing Risk; Defensible Friends?; In Memory's Kitchen. ANCHOR: JIM LEHRER; GUESTS: PATRICIA FLEMING, National AIDS Policy Director; CAROLINE SMITH DEWAAL, Center for Science; ERIC CHITTENDEN, COLD HOLLOW CIDER MILL; REP. CHRISTOPHER SMITH, [R] New Jersey; RONALD MONTAPERTO, National Defense University; CARA DE SILVA, Editor, ""In Memory's Kitchen""; CORRESPONDENTS: SPENCER MICHELS; ELIZABETH FARNSWORTH; CHARLAYNE HUNTER-GAULT; CHARLES KRAUSE;