Clint Hill's latest book Five Presidents is very good book. Clint Hill was the secret service agent that jumped on the back of the limo when Kennedy was assassinated. Clint is my Dad's first cousin. I visited with Clint at the Hostefest in Minot this year. He said my Dad taught him how to ride horse. He was a city boy that grew up Washburn ND where his father was the county Auditor. He would come out to the farm sometimes and stay. He said he and my Dad would go to the Reservation and fix fence. Clint on horseback and my Dad with the team with supplies. He said his horseback riding experience was one of the factors considered when he was assigned to Jackie K. Clint served five presidents from Eisenhower to Ford.