The United States plans to sell nearly 1 billion dollar worth of war planes, armoured vehicles and surveillance aerostats to Iraq. Pentagon sources said, the proposed sale of these aircraft, equipment and support will enhance the ability of the Iraqi forces to sustain themselves in their efforts to bring stability to Iraq and to prevent overflow of unrest into neighbouring countries. The sale is the latest in a series of US weapons deals with Iraq. The Pentagon's Defense Security Cooperation Agency informed Congress on Tuesday of the planned sale, which will go ahead unless lawmakers block the deal.