The heads of 28 NATO member states are meeting in Lisbon for the first plenary session.
There are two items on the agenda: the adoption of the bloc's strategic concept and reform of its command structure.
At a working dinner after the session they will discuss a regional missile defense plan and Russia's possible participation in NATO's European missile defense program.
Russian President Dmitry Medvedev is expected to attend the summit, heralding a new era in the military alliance's relations with its Cold War-era adversary, NATO Secretary General Anders Fogh Rasmussen said earlier on Friday.
RIA Novosti
