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In this photo, Col. Christopher Cotts, Seventh Air Force chief of staff, greets Swedish Maj. Gen. Mats Engman, right, head of policy and plans department for the Swedish Armed Forces and Swedish Neutral Nations Supervisory Commission member, and Swiss Lt. Col. Christian Guillaume, Swiss delegate to the NNSC, during an observation tour during exercise Ulchi Freedom Guardian Aug. 24, 2015, at Osan Air Base, Republic of Korea.. The NNSC provides transparency to the international community by ensuring planning and operations are conducted with a "defensive and deterrent" nature.