German police officers gather in preparation for a demonstration by members of LEGIDA, the Leipzig arm of the anti-immigrant movement PEGIDA. Hannibal Hanschke/Reuters/Landov hide caption

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German Chancellor Angela Merkel, front third from left, attends a vigil in Berlin organized by a German Muslim group to commemorate the victims of last week's attacks in Paris. Michael Sohn/AP hide caption

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A protester in Dresden, Germany, holds a poster Monday showing Chancellor Angela Merkel wearing a headscarf during a rally organized by PEGIDA, a group that is against what it calls the "Islamization of Europe." Jens Meyer/AP hide caption

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