Russia and India are to sign an additional agreement on a contract to upgrade the Admiral Gorshkov aircraft carrying cruiser, a Russian military cooperation service top official said Monday. "The document will be signed in February-March this year," deputy service director Alexander Fomin said. Moscow and New Delhi had been wrangling over the final cost of the project to upgrade the aircraft carrier since Russia said it had underestimated the cost of modernization, and asked for an additional $1.2 billion, an amount India called "exorbitant." Under the original $1.5-billion 2004 contract between Russia's state-controlled arms exporter Rosoboronexport and the Indian...