His tenure was principally dominated by arms control talks between the United States and the Soviet Union, the end of the war in Vietnam and the Soviet invasion of Afghanistan in December 1979. When he left office, US President Ronald Reagan presented him with the Medal of Freedom – an honour which Secretary General Lord Robertson received years later from US President George Bush after the 9/11 terrorist attacks in 2001.
Luns chose to rely on his personal knowledge and charisma to foster consensus. He was fully aware that NATO was an insurance policy not to be taken for granted. He advocated for robust defence policies and military investment. He continually prodded Allies with his mantra that resources had to be found, deployments had to be made, and tough decisions had to be taken. He also ensured that certain NATO programmes got his support such as the new “Science for Stability” programme launched in April 1979.
Even though he did not enjoy public engagements, he attended most receptions but never stayed for long. Contrary to what the photo below may lead one to believe, Luns was chauffeur-driven in the NATO official car - a Rolls Royce. He chose the colour green and cut a rather majestic figure riding around Brussels.