#Russian President Dmitry Medvedev has signalled willingness to discuss his country's participation in NATO's planned missile defence shield. But he stopped short of saying Moscow would sign up to the project. Medvedev agreed to travel to a NATO summit in Lisbon next month to hold talks on the issue. his comments came after a meeting with German Chancellor Angela Merkel and French president Nicolas Sarkozy in the french town of deauville aimed at persuading russia to move closer to europe.