The National Archives and Records Administration on Wednesday released nearly 1,500 confidential documents related to the assassination of President John F. Kennedy.

The government agency released the files via their website. Historians, political scholars and believers in a wide range of theories about Kennedy’s assassination immediately began poring over the documents.

Many of the documents relate to Kennedy’s assassin, Lee Harvey Oswald. Many files also reference tensions between the United States and Cuba, evaluating statements from leader Fidel Castro that allude to the possibility of Kennedy being in danger due to escalating aggression between the two nations.