Photos of the Day

Associated Press
Security guards patrol in St. Peter's Square at the Vatican, Monday, March 18, 2013. a day before the inaugural Mass of Pope Francis.  The Vatican released details of the pope's installation Mass on Tuesday as well images of his coat of arms and fisherman's ring. In addition to more than 132 government delegations, the Vatican said 33 Christian delegations will be present, as well as representatives from Jewish, Muslim, Buddhist, Sikh and Jain communities. (AP Photo/Oded Balilty)

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A roundup of today's best photos.

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