A military police officer patrols Complexo da Maré, one of the largest favelas in Rio. Photograph: Mario Tama/Getty Images

A resurgence in gang violence has led Brazil’s authorities to call up the army to help police slums in Rio de Janeiro less than four months bef(...)

Brazil’s president Dilma Rousseff: communications with several unidentified aides probed by US spy agency.  Photograph: Ueslei Marcelino/Reuters

Brazil’s government summoned the US ambassador to respond to new revelations of US surveillance of president Dilma Rousseff and her senior aides, comp(...)

US journalist Glenn Greenwald. Photograph:  Ricardo Moraes/Reuters

The US National Security Agency (NSA) spied on the communications of the presidents of Brazil and Mexico, according to a media report in Brazil. (...)