Newly released FBI documents show the FBI monitored the late Senator Edward Kennedy in 1961 when he visited Mexico, Central America and South America. One document shows that FBI chief J. Edgar Hoover received a file from an FBI employee in Mexico City that said Kennedy is “interested in meeting with 'leftists' to talk with them and determine why they think as they do.” The FBI documents also show Kennedy was the target of many death threats over the past fifty years. Threats came from the Ku Klux Klan, the Mafia and other groups.