This episode's headline: Summit Session; Curing Medicare?; New Charges. The guests include MICHAEL MANDELBAUM, Council on Foreign Relations; ADRIAN KARATNYCKY, Freedom House; LILIA SHEVTSOVA, Russian Academy of Sciences; JACK MATLOCK, Former U.S. Ambassador, Soviet Union; SEN. CHRISTOPHER DODD, [D] Connecticut; SEN. JUDD GREGG, [R] New Hampshire; RON OSTROW, Los Angeles Times; CORRESPONDENTS: SIMON MARKS; FRED DE SAM LAZARO; MARGARET WARNER. Byline: In New York: ROBERT MAC NEIL; In Washington: JAMES LEHRER