The US Department of Agriculture says it has recurring concerns about the safety of Brazilian meat.
Enrique Peña Nieto says his government did not use spyware against journalists, lawyers and activists.
South America could be home to the next major threat to the world's health, researchers say.
Will coffee taste worse as the planet warms?
How Trump's US-Mexico border wall could affect wildlife
Why violence is increasing in some areas of Colombia
Why improving Brazil's favelas can make life harder for some
Mexican politician hits back in House of Cards row
The grandmother still looking for her grandchild
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