In this photo taken on Wednesday, Oct. 9, 2019, stone expert Jean-Didier Mertz, shows a broken nose of the golden angel that was once atop Notre Dame cathedral, in a warehouse at Champs-sur-Marne, west of Paris. Scientists at the French government's Historical Monuments Research Laboratory are using these objects as clues in an urgent and vital task, working out how to safely restore the beloved Paris cathedral and identify what perils remain inside in a race against the clock. (AP Photo/Francois Mori)
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