An estimated $1tn (£600bn) a year is being taken out of poor countries and millions of lives are lost because of corruption, according to campaigners.
Colombian President Juan Manuel Santos has said he supports the legalisation of marijuana for medical use.
It’s an odd feeling, being silenced. On the Fourth of July, I heard that El Universal, Venezuela’s century-old newspaper, and among the oldest in Latin America, had been sold to a recently registered, anonymous Spanish corporation. Against a backdrop of fireworks bursting over Lake Michigan, I sat at my computer and started copying from its website into Word documents two years’ worth of weekly opinion columns I had written for the paper. I knew a flood was coming — I had seen it happen before. My laptop would be my pieces’ ark.
One of Brazil's most prominent indigenous leaders has called for police protection following a series of death threats.
One of Venezuela's main opposition leaders, Leopoldo Lopez, has told a judge in Caracas that his trial on charges of inciting violence will be a test for the country's democracy.