A Danish policeman checks passengers' identity papers on a train arriving from Germany on Jan. 6. Officials say the small country is overwhelmed by the number of refugees seeking asylum. Sean Gallup/Getty Images hide caption

Danish police conduct spot checks on incoming traffic from Germany at a highway border crossing near Padborg, Denmark, on Jan. 6. Officials say they've been overwhelmed by the 20,000 asylum seekers who came to Denmark last year. Sean Gallup/Getty Images hide caption

Duesseldorf's "Maghreb Quarter" — named for the region that includes Tunisia, Algeria and Morocco --€” is home to many North African restaurants and shops. Patrik Stollarz/AFP/Getty Images hide caption

The new "critical edition" of Mein Kampf, shown here in a Munich bookstore on Friday, is the first version of Adolf Hitler's notorious manifesto to be published in Germany since the end of World War II. Matthias Schrader/AP hide caption

Women protest Tuesday outside the cathedral in Cologne, with signs saying "We are fed up" and "We will not remain silent." Oliver Berg/EPA /Landov hide caption

Jamil Mohamad Amin, 16, (left), Zara Hussein, 16, (center) and Vice Principal Silke Donath at Johanna-Eck School in Berlin. The school has students from many backgrounds. Both students are Syrian Kurds who migrated to Germany. Soraya Sarhaddi Nelson/NPR hide caption

Three migrants from Afghanistan walk along the A3 highway shortly after they crossed into Germany on August 30, 2015, near Neuhaus am Inn, Germany. Police detained them shortly after and took them to a registration center for asylum seekers. Germany has welcomed many refugees — but now is discouraging Afghans who are seeking better economic prospects. Sean Gallup/Getty Images hide caption