epa04187692 Democratic Left Alliance (SLD) leader Leszek Miller (L) and Martin Schulz (R), top candidate of the Party of European Socialists (PES) for the European elections, during the May Day rally organized by Democratic Left Alliance and All-Poland Alliance of Trade Union in Warsaw, Poland, 01 May 2014. Later demonstrators march through the streets of Warsaw. Labour Day, also known as International Workers’ Day or May Day, is observed worldwide on 01 May. EPA/TOMASZ GZELL POLAND OUT
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