Britain's Prime Minister David Cameron (front L) bows during a ceremony commemorating the 100th anniversary of World War One in Ypres, June 26, 2014. Also pictured are (back L-R) Poland's Prime ... more 
Britain's Prime Minister David Cameron (front L) bows during a ceremony commemorating the 100th anniversary of World War One in Ypres, June 26, 2014. Also pictured are (back L-R) Poland's Prime Minister Donald Tusk, Sweden's Prime Minister Fredrik Reinfeldt, German Chancellor Angela Merkel, Cyprus' President Nicos Anastasiades, Slovenia's President Borut Pahor and France's President Francois Hollande. REUTERS/Philippe Wojazer (BELGIUM - Tags: ANNIVERSARY POLITICS CONFLICT) less 
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Reuters | Photo By PHILIPPE WOJAZER / REUTERS
Thu, Jun 26, 2014 2:44 PM EDT