Anticipation for the release of the JFK assassination files is growing. This final trove of files is set to be released by the National Archives Thursday under a 1992 law that ordered the government to make all remaining documents pertaining to the assassination public. Many conspiracy theories around the assassin Lee Harvey Oswald and whether he acted alone have swirled since. The new collection includes over 3,100 documents, some of which are related to Oswald's trip to Mexico City right before the assassination.