A Dallas police officer moves into position to control crowds as workers from the City of Dallas repave Elm Street in Dealey Plaza at the spot where the first bullet hit U.S. President John F. Kennedy... more 
A Dallas police officer moves into position to control crowds as workers from the City of Dallas repave Elm Street in Dealey Plaza at the spot where the first bullet hit U.S. President John F. Kennedy in 1963 as he rode down Elm Street in an open air limo as preparations continue one day before commemoration ceremonies of the 50th anniversary of the assassination in Dallas, November 21, 2013. The Texas School Book depository that Lee Harvey Oswald is believed to have fired from is seen at upper right. Commemorations of the anniversary will be held Friday in Dallas, Washington and Boston. REUTERS/Jim Bourg (UNITED STATES - Tags: POLITICS ANNIVERSARY) less 
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Reuters | Photo By JIM BOURG / REUTERS
Thu, Nov 21, 2013 5:57 PM EST