A controversial law to officially engage Mexico's armed forces in fighting crime has human rights groups dismayed.
Though police violence is widely tolerated in Brazil, not everyone believes in 'eye for an eye' as official state policy.
Residents of the Maré neighbourhood of Rio de Janeiro are eight times more likely to be killed by police than other Brazilians. Most victims are young and black.
By appointing generals to top political posts and hiking defence spending, Donald Trump is imperiling a cherished tenet of the US constitution: civilian control of the military.
Evidence increasingly shows the effectiveness of controversial efforts, like northeastern Brazil's Attitude Programme, to feed and house at-risk drug users.
General John Kelly, Trump's pick for the Department of Homeland Security, used to lead US military operations in Latin America. Now American citizens should be scared, too.