One of the most consequential rounds of global climate negotiations has kicked off in Belém, Brazil. Leaders from nearly every country in the world — but notably, not the US — are gathering to try to ramp up action on climate change during a time of tremendous transformation when it comes to both energy systems and international cooperation.

Dozens of Indigenous activists forced their way into the secured compound of the UN Climate Change Conference in Brazil, according to media reports. Videos from South American outlets showed protesters breaking down a door and clashing with security personnel on Tuesday evening.