Watch History Detectives Season 7 Episode 9 Online

A man from Nevada believes he holds a dagger which was owned by Italian dictator Benito Mussolini, including a letter which indicates it was retrieved from Mussolini's apartment following his death. Also, a stack of letters from post-Civil War from a freed slave emigrating from the US to Liberia; and a Cold War era, hand size device that has "National Emergency Alarm Repeater, Civilian Warning Device" printed across them.