John served in several roles throughout his career. John wrote a book titled John Fifteen Thirteen around his professional experiences. From an officer in the United States to working as a security contractor with Blackwater. John shares his beliefs and his thoughts around serving his country.
Find his book here at https://www.amazon.com/John-Fifteen-Thirteen-Nicholas-Cassel/dp/1645690822/ref=tmm_pap_swatch_0?_encoding=UTF8&qid=1637812518&sr=8-1

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