German federal police officer check passenger on their tour accompanied by media at the main railway station in the northern German town of Hamburg November 19, 2010.The increased terror threat to Germany will put security forces in a "state of emergency" until at least the end of the year, and presents the biggest challenge to German police in the postwar era, a senior official said. Germany stepped up security measures this week on the basis of intelligence pointing towards a planned attack at the end of November. REUTERS/Christian Charisius (GERMANY - Tags: CRIME LAW POLITICS)

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