 Complete the following phrase:  Upon his return from China, Tkhor was transferred to the Kiev Military District where he held the position of deputy commander of the 62nd Heavy Bomber Division under the rank of major general. In May 1941, he graduated from the Military Academy of the General Staff of the Armed Forces of Russia. At the outbreak of Operation Barbarossa he took part in the defense of the Ukrainian border. His plane was shot down in a dogfight at the closing stage of the 