A combination shows flower arrangements and spectators lining the street along Elm Street during a reconstruction of the Dealey Plaza crime scene in 1963 and the same site in November 2013

A combination shows (L) flower arrangements and spectators lining the street along Elm Street during a reconstruction of the Dealey Plaza crime scene by the United States Secret Service in this undated photograph taken in Dallas, Texas in 1963 and (R) visitors to Dealey Plaza walking along Elm and Commerce Streets in Dallas, Texas on November 10, 2013. The City of Dallas will hold commemoration ceremonies on November 22, 2013 marking the 50th anniversary of the assassination of President John F. Kennedy. REUTERS/Dallas Police Department/Dallas Municipal Archives/University of North Texas/Handout (L) and Adrees Latif (R) (UNITED STATES - Tags: POLITICS ANNIVERSARY CRIME LAW) ATTENTION EDITORS - THE IMAGE ON LEFT WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING.MANDATORY CREDIT AS WRITTEN . ATTENTION EDITORS: PICTURE 08 OF 11 FOR PACKAGE 'JFK CRIME SCENE - THEN AND NOW'. TO FIND ALL IMAGES SEARCH 'COMBINATION ADREES'