sentences:  Though he allowed himself to be interviewed on camera, Mr. Nichols used the pseudonym "Warren Adkins" in the broadcast because of his father, an FBI agent.His father had threatened him with death if the U.S. government found out Jack was his son and he lost his coveted security clearance.The use of the name "Warren" was in deference to one of Nichols' early lovers he met when visiting his aunt and uncle in Neptune Beach, Florida in 1961.