Slay was a 1965 graduate of George Washington University at Washington, D.C., with a degree in mathematics; he attended the six-week Harvard Business School Advanced Management Program; and the Canadian National Defence College.

In 2005, Slay won four gold medals at the National Senior Games in cycling.

[3] He resided in Warrenton, Virginia until he died of blood cancer on November 16, 2015, 5 days after his 91st birthday.

[4] This article incorporates public domain material from the United States Air Force

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