Men run from tear gas fired by police during an anti-slavery demonstration to demand the liberation of imprisoned abolitionist leader Biram Ould Abeid in Nouakchott

 
Men run from tear gas fired by police during an anti-slavery demonstration to demand the liberation of imprisoned abolitionist leader Biram Ould Abeid in Nouakchott
Men run from tear gas fired by police during an anti-slavery demonstration to demand the liberation of imprisoned abolitionist leader Biram Ould Abeid in Nouakchott, May 26, 2012. Security forces used tear gas to break up the protesters. Slavery still exists in some parts of Mauritania despite a 2007 law banning the practice. REUTERS/Joe Penney (MAURITANIA - Tags: SOCIETY POVERTY CIVIL UNREST POLITICS)