Lisbon summit sees "turning point" for Nato
The Nato summit held in Lisbon, Portugal is being billed as the most important meeting in the alliance's 61‑year history.
Some of the topics of the agenda will be a framework on how to pass security to Afghan forces over the next four years.
The handover from Nato-led forces to local Afghan units is expected to finish by a target date of 2014.
The BBC's political correspondent, Carole Walker, reports.