The city in Texas is marking the anniversary of the assassination of President Kennedy, who was killed on 22 November 1963.
Sites like the Texas Book Depository, the grassy knoll and Dealey Plaza continue to attract tourists to Dallas, adding to the city's economy.
Many still believe a conspiracy and cover up took place, as Nicola Longford, the chief executive of the Sixth Floor Museum, in Dallas tells the BBC's Russell Padmore.
(Picture: President John F Kennedy. Copyright Bettman.)