A US Air Force OC-135 observation aircraft conducted an "extraordinary flight" Thursday under the Open Skies treaty "to reaffirm US commitment to Ukraine" amid Russia-Ukraine tensions, the Pentagon said.
원문출처 : https://www.cnn.com/2018/12/06/politics/open-skies-flight-ukraine-russia/index.html
원문출처 : https://www.cnn.com/2018/12/06/politics/open-skies-flight-ukraine-russia/index.html