The three sources are all related to the assassination of John F. Kennedy and the controversies surrounding it. The first text is an article from *Dealey Plaza Echo*, which explores the question of who actually discovered the rifle used in the assassination, presenting several contradictory testimonies. The second article, also from *Dealey Plaza Echo*, examines the "single bullet" theory, supported by Vincent Bugliosi in his book *Reclaiming History*, and attempts to demonstrate its invalidity. Finally, the third text recounts the story of Abraham Bolden, a Secret Service agent who was accused of selling confidential documents following his criticisms of the Secret Service's operations and his experiences of racism within the organization.