Cubans Celebrate May Day

Fidel CastroJobs and WorkplaceRaul Castro
Revellers carry a photo of Cuban leader Fidel Castro during a May Day parade at Revolution Square in Havana, Cuba. Castro did not attend the annual celebration. May Day was inspired by a wave of strikes and demonstrations for a shorter work day, followed by the Haymarket Square killings... Sven Creutzmann/Mambo Photograph, Getty Images