Nato leaders have approved plans to expand a European missile defence system that would protect all of the military alliance's member nations including the US.<br /><br />Barack Obama, the US president, announced the agreement on Friday at the end of the first day of a summit of leaders from the 28-member grouping in Lisbon, the Portuguese capital.<br /><br />Dmitry Medvedev, the Russian president had previously fought against the missile shield, saying it was a threat to his country's own nuclear deterrence.<br /><br />But Nato on Friday decided to invite Russia to join the defence shield, extending its protection across Russian territory.<br /><br />Medvedev will be arriving in Lisbon on Saturday to discuss Russia's role within the Nato plans. <br /><br />Russia may demand leeway over the defence system, and also on Nato expansion into former Soviet states.<br /><br />Al Jazeera's Neave Barker reports from Moscow.
