The correct answer to this open question is the following.
Unfortunately, you did not attach the quote from Colonel Wolfgang Samuel. That is why we do not know Colonel Samuel's statement revelation about one aspect of U.S. Foreign policy during the Cold War.
However, in order to help you, we can comment on the following.
Wolfgang. W. E. Samuel had 10 years old when he and his mother tried to survive the occupation of Berlin by the Soviet Union troops, at the beginning of the Cold War. He was a witness of the airlift period in which the allies sent food and supplies to West Germany.
He later became a military official, serving the US Airforce from 1960 to 1985. After serving in the military, Samuel started a career as an author In his books he referred to the importance of the airlift and how the US Air Force and the UK Airforce helped West Berlin to survive. He comments on the policy of the United States during the Cold War, trying to apply the policy of containment to stop Communism, meanwhile, the Soviet Union was trying to spread it all over the world.
If you ware talking about Porfirio Diaz, he ruled a total of 3 1/2 decades. Tell me if you need the exact years.
