Tensions between Turkey and Greece rose in recent days as Turkish naval forces started a major exercise in contested Eastern Mediterranean waters. The ongoing dispute between the two historic rivals was triggered by the discovery of natural gas in the part of the sea which both sides claim as their own. With neither side appearing ready to back down, fears are growing of a military clash between the NATO members. Dorian Jones reports from Istanbul.
Camera: Berke Bas Produced by: Rob Raffaele