Green beret
When visiting the Special Forces at Fort Bragg on 12 October 1961, President John F. Kennedy asked Brigadier General William P. Yarborough to make sure that the men under his command wore green berets for the visit. Later that day, Kennedy sent a memorandum which included the line: "I am sure that the green beret will be a mark of distinction in the trying times ahead". By America's entry into the Vietnam War, the green beret had become a symbol of excellence throughout the US Army. On April 11, 1962 in a White House memorandum to the United States Army, President Kennedy reiterated his view: "The green beret is a symbol of excellence, a badge of courage, a mark of distinction in the fight for freedom". To no avail, both Yarborough and Edson Raff had previously petitioned the Pentagon to allow wearing of the green beret. The President, however, did not fail them.
Robin Moore
Thanks to connections with Harvard classmate Robert F. Kennedy, Moore was allowed access to the U.S. Army Special Forces to write about this elite unit of the United States Army. It was General William P. Yarborough who insisted that Moore go through special forces training in order to better understand "what makes Special Forces soldiers 'special'." He trained for nearly a year, first at "jump school" for airborne training before completing the Special Forces Qualification Course or "Q Course", becoming the first civilian to participate in such an intensive program. Afterwards, Moore was assigned to the 5th Special Forces Group on deployment to Vietnam. His experiences in-country formed the basis for "The Green Berets", a bestseller that helped secure him international acclaim (see United States Army Special Forces in popular culture).