Russia ups retaliatory action after downing of jet by Turkey; looks to ban Turkish agricultural imports amid other 'restrictive measures.' Russia is preparing a raft of retaliatory economic measures against Turkey after Ankara downed one of its warplanes, Prime Minister Dmitry Medvedev said Thursday - with Israel among several countries likely to benefit as Moscow looks for alternative trading and tourism partners. "The government has been ordered to work out a system of response measures to this act of aggression in the economic and humanitarian spheres," Medvedev told a cabinet meeting in televised comments. He said under Russian law the...