Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows the exterior of the Texas School Book Depository the afternoon of November 22, 1963, after the assassination. Many police officers stand around the entrance and southeast corner of the building. An unidentified man in a white shirt bends over a box visible in the open southeast corner window on the sixth floor.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen Friday afternoon after the assassination - between 12:30 and 1 p.m. This image shows the exterior of the Texas School Book Depository. Dallas Morning News reporter Jim Ewell can be seen in the foreground of the image. Cars, people and police officers crowd around the base of the building. Windows are open on the building's upper floors, including the southeast corner window on the sixth floor. Piles of boxes can be seen through that window in an area that was later identified as the sniper's perch. The Hertz sign on the roof is partially visible.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen Friday afternoon after the assassination - between 12:30 and 1 p.m. This image shows the exterior of the Texas School Book Depository. Cars, people and police officers crowd around the base of the building. Windows are open on the building's upper floors, including the southeast corner window on the sixth floor. Piles of boxes can be seen through that window in an area that was later identified as the sniper's perch.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen Friday afternoon after the assassination. This image shows eyewitness Charles Brehm in Dealey Plaza.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen Friday afternoon after the assassination. This image shows eyewitness Charles Brehm at the scene in Dealey Plaza.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen Friday afternoon after the assassination. This image shows eyewitness Charles Brehm in Dealey Plaza.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen Friday afternoon after the assassination. This image shows a fifth floor window of the Texas School Book Depository. One side is open.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen Friday afternoon after the assassination - between 12:30 and 1 p.m. This image shows a Dallas Fire Department fire engine in the intersection of Elm and Houston streets. Police officers and cars and men wearing fire department coats and hats fill the intersection. Crowds can be seen on the sidewalks and people also lean out of office windows in the Dal-Tex Building.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows President Kennedy and Vice President Lyndon B. Johnson along with Lady Bird Johnson at the Fort Worth Chamber of Commerce breakfast at the Hotel Texas in Fort Worth on November 22, 1963.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. The image shows George Senator, Jack Ruby's roommate. Senator took reporters and photographers to the apartment he shared with Ruby on Sunday, November 24, 1963.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. The image shows George Senator, Jack Ruby's roommate. Senator took reporters and photographers to the apartment he shared with Ruby on Sunday, November 24, 1963.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows two Dallas Police officers (Left: Inspector J. Herbert Sawyer. Right: Marvin Wise.) guarding the entrance to the Texas School Book Depository on November 22, 1963 after the assassination. The officer on the right holds a shotgun in his left hand.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen Friday afternoon after the assassination. This image shows Dallas Police officers outside the entrance to the Texas School Book Depository.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows Dallas Police officers on the northeast corner of the Texas School Book Depository on November 22, 1963. Police officers have used rope and vehicles to separate the crowd from the building.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows Dallas Police officers on the northeast corner of the Texas School Book Depository on November 22, 1963.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows Dallas Police officers on the steps to the entrance of the Texas School Book Depository on November 22, 1963.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows President Kennedy and Vice President Lyndon B. Johnson along with Lady Bird Johnson at the Fort Worth Chamber of Commerce breakfast at the Hotel Texas in Fort Worth on November 22, 1963.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows President Kennedy and Vice President Lyndon B. Johnson at the Fort Worth Chamber of Commerce breakfast at the Hotel Texas in Fort Worth on November 22, 1963. Lady Bird Johnson is at the left edge of the picture.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows President Kennedy and Vice President Lyndon B. Johnson along with Lady Bird Johnson at the Fort Worth Chamber of Commerce breakfast at the Hotel Texas in Fort Worth on November 22, 1963.

Original black and white photographic negative taken by Dallas Times Herald photographer William Allen. This image shows President Kennedy greeting the crowd outside the Hotel Texas in Fort Worth. The cameraman at right is WFAA-TV's Tom Alyea.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows President Kennedy shaking hands with the crowd in the parking lot of the Hotel Texas in Fort Worth on the morning of November 22, 1963.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows President Kennedy shaking hands with the crowd in the parking lot of the Hotel Texas in Fort Worth on the morning of November 22, 1963.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows President Kennedy in Fort Worth waiting to speak on the morning of November 22, 1963 in the parking lot at the Hotel Texas.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows President Kennedy in Fort Worth waiting to speak on the morning of November 22, 1963 in the parking lot at the Hotel Texas.