FILE - In this Nov. 22, 1963 file photo, President John F. Kennedy and first lady Jacqueline Kennedy ride in the backseat of an open limousine on Main Street at Ervay Street in Dallas as the presidential motorcade approaches Dealey Plaza. Texas Gov. John Connally, and his wife Nellie are seated in the limousine's jump seats. Five decades after President John F. Kennedy was fatally shot and long after official inquiries ended, thousands of pages of investigative documents remain withheld from public view. The contents of these files are partially known and conspiracy buffs are not the only ones seeking to open them for a closer look. (AP Photo/File)