12 of 37: Demonstrators in tents spend the night at Sol square during a protest in Madrid, Friday May 20, 2011. Spanish university students and youth groups are protesting against a youth unemployment rate of 40 percent and austerity measures taken to end Spain's debt crisis. The biggest banner in Spanish reads "Change". (AP Photo/Emilio Morenatti) (AP Photo/ Emilio Morenatti)

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