Belgium's Queen Mathilde attends a choir concert of more than 1,000 professional and non-professional singers performing during the "Thousand Voices for Peace" event at the Koekelberg basilica in Brussels November 9, 2014. Thirty-nine choirs coming from countries that were involved in the First World War sang together as an homage for peace, organisers Flanders Festival said. REUTERS/Yves Herman (BELGIUM - Tags: ENTERTAINMENT CONFLICT ROYALS)