These relations must be changed and their change is possible . '' NEW : Medvedev says deal possible on nuclear fuel swap with Iran . Brazilian President Medvedev says talks are `` last chance '' to resolve nuclear issue . Group of 15 decision imminent on possible sanctions against Iran . Lula in Iran ahead of U.N. Security Council developing nations meeting in Iran .
NEW : Medvedev says deal possible on nuclear fuel swap with Iran . Brazilian President Medvedev says talks are `` last chance '' to resolve nuclear issue . Group of 15 decision imminent on possible sanctions against Iran . Lula in Iran ahead of U.N. Security Council developing nations meeting in Iran .