Photos: May Day protests around the world

An old man looks at the protesters participating in the May Day workers march in Lisbon, Tuesday, May 1, 2012. The march was marked by protests against economic austerity measures and labor law reforms, that included cut holiday entitlement, more flexible working hours and cut compensation for layoffs, that have been enacting by the Portuguese government in return to a euro78 billion ($112 billion) bailout received in 2011. Portugal's unemployment rate is 15%, which is the third highest among the Eurozone countries. (AP Photo/Francisco Seco)