Now playing Next World News Carbon 'saturation' of tropical forests risks worsening climate change By 2030, tropical forests may stop become a carbon sink and turn into carbon sources 06/03/2020
Now playing Next World News Coronavirus: Global markets fall amid pessimism over response measures World shares dropped on Friday after a sharp fall on Wall Street, as doubts over action to counter COVID-19 came to the fore. 06/03/2020
Now playing Next USA NASA's new Mars rover gets a name — Percy, for short First came Sojourner. Then Spirit and Opportunity. Curiosity followed. 05/03/2020
Now playing Next USA Disappearing beaches: Climate change could wipe out half of the world's sandy shorelines Scientists found that beaches, which occupy one-third of global coastlines, are threatened by coastal erosion and rising seas. 05/03/2020
Now playing Next USA Biden increases delegate lead over Sanders after more allocated in Texas The former vice president is on top, 565 to 506, in the race to the nomination. 05/03/2020
Now playing Next USA Dubai's Sheikh Mohammed abducted daughters, threatened ex-wife, U.K. judge rules Save for some "limited exceptions", Judge Andrew McFarlane said he had concluded that Princess Haya bint al-Hussein had "proved her case." 05/03/2020
Now playing Next USA Elizabeth Warren to drop out of the US presidential race This comes after her poor performance on Super Tuesday. 05/03/2020
Now playing Next USA Elizabeth Warren ends presidential run Warren wowed crowds with her sharp intellect, her clear prognoses for complex problems, and her endless stream of policy blueprints to tackle them. 05/03/2020
Now playing Next World News COVID-19 and xenophobia: Why outbreaks are often accompanied by racism The rules are simple: Wash your hands and don't point the finger. 05/03/2020
Now playing Next USA Why Biden's chance of beating Sanders is even bigger than it seems Three reasons why the former VP is amassing what could be an insurmountable delegate lead. 05/03/2020
Now playing Next USA Super Tuesday lessons: 7 key takeaways from a big night Results from the voting in 14 states and NBC exit polls reveal a lot about the state of Democratic race to take on Trump. 04/03/2020
Now playing Next USA Billionaire Mike Bloomberg drops out of Democratic presidential race He pumped $500 million of his own fortune into the campaign. 04/03/2020
Now playing Next USA Bloomberg spent nearly $200M on ads in Super Tuesday states. It didn't get him much. The billionaire former New York City mayor outspent the rest of the field, but it didn't translate into votes. 04/03/2020
Now playing Next USA Biden grabs the delegate lead, and it's going to be hard for Sanders to catch him First Read is your briefing from "Meet the Press" and the NBC Political Unit on the day's most important political stories and why they matter. 04/03/2020
Now playing Next USA Bloomberg reassessing candidacy, will meet with advisers The former New York City mayor fell short in most Super Tuesday states, lagging far behind in the delegate count. 04/03/2020
Now playing Next USA Biden takes Massachusetts, defeating home state Sen. Warren and Sanders, NBC projects Once the favorite, Warren fell to third place in the Bay State 04/03/2020
Now playing Next USA Biden wins Minnesota, after home state Sen. Klobuchar drops out, NBC projects The senator endorsed the former vice president at a rally in Texas. 04/03/2020