Original black and white photographic negative taken by a Dallas Times Herald staff photographer. This image shows Air Force One on the tarmac at Love Field on the morning of November 22, 1963.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen Friday afternoon after the assassination. This image shows the alleged sniper's perch window on the sixth floor of the Texas School Book Depository. An unidentified Dallas Police detective is visible through the open window.

Original black and white photographic negative taken by Dallas Times Herald staff photographer Eamon Kennedy. This image shows the United States flag flying at half staff outside Parkland Hospital on November 22, 1963.

Original black and white photographic negative taken by Dallas Times Herald and United Press International photographer Darryl Heikes. This image shows assassination eyewitness Charles Brehm giving a telephone interview while at the Dallas County Sheriff's office the afternoon of November 22, 1963.

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 and United Press International photographer Darryl Heikes. This image shows assassination eyewitnesses Jean Hill (left) and Mary Moorman (right) at the Dallas County Sheriff's office the afternoon of November 22, 1963.

Original black and white photographic negative taken by Dallas Times Herald and United Press International photographer Darryl Heikes. This image shows assassination eyewitnesses Jean Hill (left) and Mary Moorman (right) at the Dallas County Sheriff's office the afternoon of November 22, 1963.

Original black and white photographic negative taken by an unidentified Dallas Times Herald staff photographer. This image shows Assistant White House Press Secretary Malcolm Kilduff and members of the Secret Service walking past ambulance driver Aubrey Rike as they head toward the emergency entrance of Parkland Hospital. The men are walking between a white car from the Oneal Funeral Home and another vehicle, which has one door open. Kilduff made the official announcement of President Kennedy's death a short while later at a press conference held at Parkland at 1:30 p.m. on November 22, 1963.

Original black and white photographic negative taken by an unidentified Dallas Times Herald staff photographer. This image shows Assistant Press Secretary Malcolm Kilduff at the press conference announcing President Kennedy's death at Parkland Hospital. Kilduff made the announcement at 1:30 p.m. on November 22, 1963, only one hour after the president was shot.

Original black and white photographic negative taken by Dallas Times Herald staff photographer Bill Beal. This image shows a camera misfire.

Original black and white photographic negative taken by a Dallas Times Herald staff photographer showing a camera misfire.

Original black and white photographic negative taken by a Dallas Times Herald staff photographer. This image shows a camera misfire of what appears to be the Parkland Hospital roofline.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. The image is truncated because it was the first picture taken on this roll of film. The partial image is a camera misfire which appears to show a sidewalk and part of a person's shoe.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image may be a camera misfire; it shows a sidewalk and curb, some litter and the lower part of a man's leg.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image may be a camera misfire; it shows a sidewalk and curb, some litter and the lower part of a man's leg.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image is a camera misfire which appears to show pavement, the shoes and shadows of one or two people and what may be the photographer's camera strap.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image is a camera misfire which appears to show pavement, the shoes and shadows of one or two people and part of a license plate.

Original black and white photographic negative taken by Dallas Times Herald and United Press International photographer Darryl Heikes. The image shows a camera misfire.

Original black and white photographic negative taken by Dallas Times Herald and United Press International photographer Darryl Heikes. The image shows a camera misfire.

Original black and white photographic negative taken by an unidentified Dallas Times Herald staff photographer. The image is a camera misfire which appears to show the floor, the photographer's foot and his camera strap.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image shows a camera misfire.

Original black and white photographic negative taken by a Dallas Times Herald staff photographer. This image is a camera misfire.

Original black and white photographic negative taken by Dallas Times Herald staff photographer William Allen. This image is a camera misfire which appears to show pavement, the lower part of an overcoat with plaid lining, and the rear bumper and back-right tire of a light-colored Ford Galaxie.

Original black and white photographic negative taken by a Dallas Times Herald staff photographer showing a camera misfire.