The final section of this chapter considers the possibility that Jack Ruby was part of a conspiracy to assassinate President Kennedy. The Commission explored Ruby’s background and his activities in the months prior to the assassination, and especially his activities in the 2 days after the assassination, in an effort to determine whether there was any indication that Ruby was implicated in that event. The Commission also sought to ascertain the truth or falsity of assertions that Oswald and Ruby were known to one another prior to the assassination. In considering the question of foreign involvement, the Commission has received valuable assistance from the Department of State, the Central Intelligence Agency, the Federal Bureau of Investigation, and other Federal agencies with special competence in the field of foreign investigation. Some of the information furnished by these agencies is of a highly confidential nature. Nevertheless, because the disclosure of all facts relating to the assassination of President Kennedy is of great public importance, the Commission has included in this report all information furnished by these agencies which the Commission relied upon in coming to its conclusions, or which tended to contradict those conclusions. Confidential sources of information, as contrasted with the information itself, have, in a relatively few instances, been withheld. CIRCUMSTANCES SURROUNDING THE ASSASSINATION Earlier chapters have set forth the evidence upon which the Commission concluded that President Kennedy was fired upon from a single window in the southeast corner of the sixth floor of the Texas School Book Depository, and that Lee Harvey Oswald was the person who fired the shots from this point. As reflected in those chapters, a certain sequence of events necessarily took place in order for the assassination to have occurred as it did. The motorcade traveled past the Texas School Book Depository; Oswald had access to the sixth floor of the building; Oswald brought the rifle into the building; the cartons were arranged at the sixth-floor window; and Oswald escaped from the building before the police had sealed off the exits. Accordingly, the Commission has investigated these circumstances to determine whether Oswald received help from any other person in planning or performing the shooting. Selection of Motorcade Route