During Graham Ison’s thirty-year career in Scotland Yard’s Special Branch he was involved in several espionage cases. He also spent four years at 10 Downing Street as Protection Of...visualizza altroDuring Graham Ison’s thirty-year career in Scotland Yard’s Special Branch he was involved in several espionage cases. He also spent four years at 10 Downing Street as Protection Officer to two Prime Ministers. He is an honorary agent of the US Army Criminal Investigation Command.visualizza meno