Two views of the Tarrant County Courthouse in downtown Fort Worth, Texas. The historic photo shows the motorcade of U.S. President John F. Kennedy and was taken on November 22, 1963.

Historic photo: The White House/John F. Kennedy Presidential Library and Museum; 2013 photo: Cecil W. Stoughton / Reuters

Two views of Dealey Plaza in Dallas. In the historic photo, Bill and Gayle Newman, civilian eyewitnesses to the assassination of President John F. Kennedy, cover their children as CBS News photographer Tom Craven (C) and White House photographer Tom Atkins (R) take pictures. The present-day photo shows tourists taking photos with a tablet on the same site on Nov. 10, 2013.

Historic photo: The White House/John F. Kennedy Presidential Library and Museum; 2013 photo: Adrees Latif / Reuters

Two views of Dealey Plaza in Dallas show the Texas Book Depository building, from which Lee Harvey Oswald allegedly shot Kennedy, in 1963 and in 2013.

Historic photo: Dallas Police Department/Dallas Municipal Archives; 2013 photo: Adrees Latif / Reuters

Two views of Dealy Plaza in Dallas. In the black and white photo from 1963, flower arrangements and spectators line Elm Street during a reconstruction of the crime scene by the United States Secret Service. The color photo was taken from the same vantage point on November 10, 2013.

Historic photo: Dallas Police Dept. John F. Kennedy collection; 2013 photo: Adrees Latif / Reuters

Two views of the Texas Theatre in Dallas, Texas, where Lee Harvey Oswald was arrested for the murder of Officer J.D. Tippit. In the historic photo, an unidentified police officer points out the seat where Oswald sat; in the 2013 photo, George Quartz, the events coordinator for the Texas Theatre, poses for a photograph in the same location.

Historic photo: Dallas Police Dept. John F. Kennedy collection; 2013 photo: Adrees Latif / Reuters

Find more historic photos from the Press Herald archives at www.pressherald.com/flashback.