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Green Party presidential nominee Jill Stein said Wednesday she doesn't believe either mainstream candidate is fit for the White House, brushing aside criticism that her bid could help elect Donald Trump.

At the end of day 12 in Rio, here are today's headlines:

The US government is increasingly concerned that advances in North Korea's weapons program have dramatically decreased the warning time for a nuclear attack

The dramatic journey of a four-ton elephant swept by floodwaters from India to Bangladesh has ended in tragedy.

July was the world's hottest month ever, according to NASA, the tenth month in a row to break temperature records globally.

The decision by Aetna to reduce its presence in indvidual health exchanges is a blow, but Obamacare can still be made to work, writes Dean Baker.

Rio Olympics: Was an Egyptian judo player punished for refusing to shake hands with the Israeli athlete that defeated him?

African art comes alive with a mix of photography, DNA testing and maps

By bringing on seasoned strategist Kellyanne Conway as campaign manager, Trump significantly improved his presidential prospects, says Errol Louis.

Tim Kaine on Wednesday responded to 14-year-old comments he made that President Bill Clinton should have resigned in the wake of the Monica Lewinsky scandal.

Japan's Kaori Icho won her fourth Olympic gold medal by claiming the freestyle wrestling title at Rio 2016.

Six people were injured on an amusement park ride at Ocean Beach Park in New London, Connecticut, on Tuesday.

Donald Trump is pushing back against reports about his campaign chairman's links to a pro-Russia political party in Ukraine by claiming Hillary Clinton also has ties to Russia and its president, Vladimir Putin.

Shane Todd, a familiar face in the popular "Tips From Former Smokers" campaign ads, has died from complications of cancer. He was 49.

Latino voters find Hillary Clinton to be more trustworthy than Donald Trump, according to a new poll.

Caitlyn Jenner's "I Am Cait" will not be having a third season, CNN confirms.

The high unfavorables of the two major party presidential candidates could leave room for a strong third party finish, writes Lara Brown.

Read CNN's Fast Facts about Adam Gadahn and learn more about the al Qaeda translator and spokesman who died in January 2015.

Hillary Clinton met with Paul McCartney while campaigning in Cleveland on Wednesday, according to an aide, talking with the former Beatle at the Quicken Loans Arena.