(B1) Key: (A) Sixth Floor Window (rifle and cartridge cases found here); (B) Wooden Fence on Grassy Knoll where witnesses saw a "puff of smoke". Position of the presidential limousine: (a) position where view of Kennedy from Texas Book Depository is obscured by tree; (b) position at the time of Kennedy's reaction to first shot; (c) position at time of Governor Connally's reaction to a shot; (d) position of Kennedy's car at the time of the fatal head shot.