The federal government has just released thousands of formerly secret CIA and FBI files on the assassination of President John F. Kennedy in 1963. Historians are now reviewing the documents. Some of the preliminary revelations include a 1975 document that details multiple CIA plots to assassinate Cuban leader Fidel Castro under the Kennedy administration, including working with mobsters to poison Castro with a pill. The federal government was expected to finally release all of the Kennedy assassination documents, but in a chaotic late-night move, Trump ended up blocking the release of some of the documents, under pressure from intelligence agencies. Other parts of the released files ended up being redacted. The final files are now expected to be released in April.