Original sentence: In a carefully set up operation as part of an ongoing surveillance effort of the Sokol Aircraft plant in Nizhny Novogrod, a fake business firm set up by the FSB bought several MiG-31s for as little as five American dollars per plane.In reality a MiG-31 costs about 3.7 million dollars.Recently, the MiG-31 has become the center of controversial investigation by the government of the Russian Federation.The operation was part of an ongoing war president Dmitry Medvedev has vowed to wage against corruption in the Russian government and military