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The possibility of Donald Trump winning the presidential election this November has renewed media and public interest in one of the most important responsibilities of the president: commanding America's massive nuclear arsenal and averting nuclear war.

Words can change meaning over time -- especially when they are spoken by politicians. Just ask Bill Clinton to define "is."

Katie Ledecky is building a legend of her own, capping her Rio Olympics with a stunning win in the women's 800-meter freestyle.

Seven people were injured, including four critically, in an explosion at a Texas crude-oil plant, authorities said.

If the world's fastest man is focused on coming away from the Olympic Games with an unprecedented "Triple-Triple" of gold medals, Usain Bolt's mother also has an eye on the future.

Who was the swimmer that sent Singapore wild and denied US swimming legend Michael Phelps his 23rd Olympic gold medal?

If there was a record for breaking records, Michael Phelps would doubtless don his goggles and cap to swim for it.

Now that Hillary Clinton has released her 2015 tax returns, and her running mate, Tim Kaine, has released a decade of his returns, the Twilight Zone that is Donald Trump's tax return release position has gotten even more shadowy.

The conviction of Brendan Dassey, a Wisconsin man who appeared in the documentary "Making a Murderer," has been overturned by a federal judge in Milwaukee, according to court documents obtained by CNN.

Former Penn State assistant football coach Jerry Sandusky broke his long courtroom silence Friday, his voice rising to say "absolutely not" when asked whether he committed the crimes for which he was convicted four years ago.

Gabby Douglas received backlash for not placing her right hand over her heart during the national anthem at the Olympics during the medal ceremony.

For black women in America, the past several years have been deeply painful. Not that it's ever been a joy ride, exactly. We just thought this journey was getting a little smoother, that we could drop our guard a bit and just live.

Team USA has reigned supreme in women's Olympic soccer since Athens in 2004, but there will be a new champion this year in Rio after Sweden knocked out the defending champion on penalties at the quarterfinal stage in Brasilia Friday.

Donald Trump on Friday attempted to walk back the widely criticized false claim he repeatedly made over the last two days that President Barack Obama and Hillary Clinton were "co-founders" of ISIS -- saying he was being sarcastic.

A Chinese swimmer has failed a drugs test at the Rio Olympics, according to China's state-run news agency Xinhua, citing the China Swimming Association (CSA).

Bill and Hillary Clinton get paid a lot of money to talk.

A lobbying group is preventing the government from imposing federal safety standards and regulations for amusement parks. CNN's Jake Tapper reports.

President Barack Obama once again proved his eclectic taste in music, releasing two summer playlists Thursday.

Donald Trump said in an interview Thursday that he would support trying US citizens suspected of terrorism in military tribunals -- a controversial proposal that would likely be challenged as unconstitutional.