The Christmas market near the Kaiser Wilhelm Memorial Church in Berlin continues on Dec. 22. Somber but determined not to be cowed, visitors flocked to the market as it reopened three days after being struck in a deadly truck assault. Michael Kappeler/AFP/Getty Images hide caption

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Michael Kappeler/AFP/Getty Images

A body is covered with a thermal blanket after a shootout between Italian police and a man near a train station in Milan's Sesto San Giovanni neighborhood early Friday. Italy's interior minister said the man killed is "without a shadow of doubt" Anis Amri, the suspect in the Berlin Christmas market attack. Daniele Bennati/AP hide caption

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Daniele Bennati/AP