Santa Marta, Rio's best known favela, had freed from drug and arm gangs before 2008 with a government model of so-called "pacification", but criminals are back in charge.
NASA-backed six-member group emerges from eight-month isolation in a Mars simulator near the largest active volcano in the world.
The storm continues to intensify before hitting the Leeward Islands and the northeastern Caribbean Sea Monday night. Last week's powerful Hurricane Irma left at least 84 people dead.
The Missouri city erupted in street demonstrations after a court delivered a not guilty verdict to former St Louis police officer Jason Stockley in the 2011 killing of a black man following a high-speed chase.
As the UN General Assembly holds its 72nd session under its new secretary-general, a political will appears to be emerging for the much-debated UN reforms. But the task is not as simple as it seems.
The Trump administration had previously announced it was pulling out of the agreement, which aims to limit carbon dioxide and other fossil fuel emissions.
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