The territory in the Soviet Union was attached to the strictly confidential duty to reconnoiter from super-altitude, among the cold war of the United States and the Communist bloc. Affiliation is CIA and air force is also the spy machine with which the existence was hidden. However, it was shot down by the antiaircraft missile of the Soviet Union during the strategy flight, and the pilot became a prisoner of war. They are touch-and-go and the unfortunate body which was also able to hang down the crisis of the one step this side of third World War. Even now, improvement is continued and the data of ozone layer depletion is collected by altitude as peaceful use.