On the March 6 , 1975 , edition of '' Good Night America '' , Rivera had as his guests JFK assassination researchers Robert Groden and Dick Gregory , who presented the first-ever network television showing of the Zapruder film . The public 's response and outrage to that television showing quickly led to the forming of the Hart-Schweiker investigation , contributed to the Church Committee Investigation on Intelligence Activities by the United States , and resulted in the House Select Committee on Assassinations investigation
JFK assassination
Assassination of John F. Kennedy
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