Judge John R. Tunheim served as chairman of the US Assassination Records Review Board, an independent federal agency in charge of declassifying government records of the Kennedy assassination.

This undated photo from the US State Department obtained by Jefferson Morley, a former Washington Post reporter, shows a passport photo of CIA Agent George Joannides. Fifty years after President John F. Kennedy's assassination, several hundred still-classified pages from government files concern the deceased CIA agent.

This Nov. 19, 1964, image provided by the Warren Commission shows a reconstruction of the approximate view the assassin of President John Kennedy might have had.

House Assassinations Committee chief counsel G. Robert Blakey (second to left) met with committee chairman Louis Stokes (left) before the panel went into closed session in Washington, on Dec. 22, 1978, to explore new evidence of a second gunman in the assassination of President John F. Kennedy.

This Sept. 26, 1964, photo shows one of the exhibits contained in the Warren Commission report. The commission said the handbills in the image were samples of ones on which Lee Harvey Oswald had stamped his name and the name "A.J. Hidell." The image below was identified as showing Oswald distributing the handbills in New Orleans on Aug. 16, 1963.

This series of June 13, 1967, photographs provided by the Warren Commission shows four sides of a bullet, found at Parkland Hospital, which was the subject of a dispute over which stretcher it had come from — Texas Governor John Connally's or President John F. Kennedy's. Tests showed it came from Lee Harvey Oswald's rifle.

In this Oct. 4, 1966, photo, lawyer Mark Lane pointed to a photo showing the route followed by President John F. Kennedy on Nov. 22, 1963, in Dallas, during a news conference in Paris criticizing the report of the Warren Commission.

In this image taken by presidential aide Dave Powers and photographed from a television screen, President John F. Kennedy and Jacqueline Kennedy waved from his limousine in Dallas.

Nov. 9, 2011: Nathan Raab (left) and his father, Steven Raab, talked about their recently discovered White House communications tapes involving Air Force One in flight from Dallas on Nov. 22, 1963.