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Uruguay's Diego Lugano (L) fights for the ball with Colombia's Juan Cuadrado during their 2014 World Cup round of 16 game at the Maracana stadium in Rio de Janeiro June 28, 2014. REUTERS/Kai Pfaffenbach

Uruguay's Diego Lugano (L) fights for the ball with Colombia's Juan Cuadrado during their 2014 World Cup round of 16 game at the Maracana stadium in Rio de Janeiro June 28, 2014. REUTERS/Kai Pfaffenbach

Williams Formula One driver Felipe Massa of Brazil crashes with his car in the first corner after the start of the German F1 Grand Prix at the Hockenheim racing circuit, Germany, July 20, 2014. REUTERS-Kai Pfaffenbach

Williams Formula One driver Felipe Massa of Brazil crashes with his car in the first corner after the start of the German F1 Grand Prix at the Hockenheim racing circuit, Germany, July 20, 2014. REUTERS-Kai Pfaffenbach

Sharon Day-Monroe of the U.S. competes in the high jump event during the women's pentathlon at the world indoor athletics championships at the ERGO Arena in Sopot March 7, 2014. REUTERS/Kai Pfaffenbach ...

Sharon Day-Monroe of the U.S. competes in the high jump event during the women's pentathlon at the world indoor athletics championships at the ERGO Arena in Sopot March 7, 2014. REUTERS/Kai Pfaffenbach ...

Turkish Kurdish women mourn during the funeral of Kurdish fighters killed during clashes against Islamic State in Kobani, at a cemetery in the southeastern town of Suruc, Sanliurfa province, Turkey, October 21, 2014. REUTERS-Kai Pfaffenbach

Turkish Kurdish women mourn during the funeral of Kurdish fighters killed during clashes against Islamic State in Kobani, at a cemetery in the southeastern town of Suruc, Sanliurfa province, Turkey, October 21, 2014. REUTERS-Kai Pfaffenbach

A flight schedule board is updated with cancelled flights of German airline Lufthansa during strike action by Lufthansa pilots at Fraport airport in Frankfurt April 3, 2014. Lufthansa pilots were on strike for a second day grounding Germany's largest airline in a row over retirement conditions. REUTERS/Kai Pfaffenbach

A flight schedule board is updated with cancelled flights of German airline Lufthansa during strike action by Lufthansa pilots at Fraport airport in Frankfurt April 3, 2014. Lufthansa pilots were on strike for a second day grounding Germany's largest airline in a row over retirement conditions. REUTERS/Kai Pfaffenbach

Bodo Ramelow of the Left party smiles prior to deputies voting for a new Thuringia state premier in parliament in Erfurt December 5, 2014. REUTERS/Kai Pfaffenbach

Bodo Ramelow of the Left party smiles prior to deputies voting for a new Thuringia state premier in parliament in Erfurt December 5, 2014. REUTERS/Kai Pfaffenbach

Ukraine's Alina Fodorova competes in the long jump event during the women's pentathlon at the world indoor athletics championships at the ERGO Arena in Sopot March 7, 2014. REUTERS/Kai Pfaffenbach ...

Ukraine's Alina Fodorova competes in the long jump event during the women's pentathlon at the world indoor athletics championships at the ERGO Arena in Sopot March 7, 2014. REUTERS/Kai Pfaffenbach ...

A Turkish Kurd shows the victory sign as he carries a coffin during the funeral of three Kurdish fighters killed during clashes against Islamic State in Syrian town of Kobani, at a cemetery in the southeastern town of Suruc, Sanliurfa province October 23, 2014. REUTERS-Kai Pfaffenbach

A Turkish Kurd shows the victory sign as he carries a coffin during the funeral of three Kurdish fighters killed during clashes against Islamic State in Syrian town of Kobani, at a cemetery in the southeastern town of Suruc, Sanliurfa province October 23, 2014. REUTERS-Kai Pfaffenbach

A Turkish Kurdish woman sports a wrist band with the Kurdish colours as she gestures with others at the funeral of Kurdish fighters killed during clashes against Islamic State in Kobani, at a cemetery in the southeastern town of Suruc, Sanliurfa province, Turkey, October 21, 2014. REUTERS-Kai Pfaffenbach

A Turkish Kurdish woman sports a wrist band with the Kurdish colours as she gestures with others at the funeral of Kurdish fighters killed during clashes against Islamic State in Kobani, at a cemetery in the southeastern town of Suruc, Sanliurfa province, Turkey, October 21, 2014. REUTERS-Kai Pfaffenbach

A German riot police officer fights with Blockupy protester in front of the new European Central Bank (ECB) headquarters in Frankfurt, November 22, 2014. REUTERS/Kai Pfaffenbach

A German riot police officer fights with Blockupy protester in front of the new European Central Bank (ECB) headquarters in Frankfurt, November 22, 2014. REUTERS/Kai Pfaffenbach