Forty years after President John F Kennedy’s assassination, an overwhelming majority of Americans do not believe the official conclusion that Lee Harvey Oswald, acting alone, killed the president with a cheap mail-order rifle fired from the Texas School Book Depository.

IT was exactly 12.30pm when the shots rang out and John F Kennedy, the 35th president of the United States of America, slumped forward in the open-top limousine carrying him through the streets of Dallas.