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Our political panel weighs in on "The Lead."

A woman discovered a baby boy left in a box on the streets of Brazil near a trash bin -- with the umbilical cord still attached to him.

It's a Cold War-era dance of spies that continues, even in 2016. CNN's Barbara Starr reports.

Former CIA director and current top Trump adviser, James Woolsey talks about the chess game going on with Vladimir Putin.

Senator Amy Klobuchar (D) joins "The Lead" from Ukraine to react to Russian sanctions and Donald Trump's response.

As a group of expelled Russian diplomats and their families prepare to leave the US, Russian President Vladimir Putin took no action against their American counterparts, opting instead to issue a statement criticizing the Obama administration. CNN's Jim Sciutto reports

Putin passes on revenge, invites American kids to Kremlin. CNN's Jim Sciutto reports.

After Russian President Vladimir Putin announced he would not retaliate against the US for President Barack Obama's sanctions, President-elect Donald Trump tweeted his approval. CNN's Sunlen Serfaty reports.

Satellite technology has picked up on a possible Vikings site in North America. This could be the second Norse site to be discovered on the continent.

Actress Billie Lourd shared stories about her famous mother and grandmother, Carrie Fisher and Debbie Reynolds, during talk show appearances in December.

Elizabeth Smart speaks out about the role pornography played in her kidnapping in 2002. Her kidnapper was sentenced to life in prison.

Lisa Swanson heard her late son Levi Schulz's heart beating in an organ transplant recipient for the first time since his tragic death.

This year has had some lows, but there were also some inspiring moments. Here are some of the most heartwarming ones.

Bigelow Aerospace is building space habitats for the public. Get an exclusive tour inside one of their prototypes, and see where we would live in space.

Pete Souza is Chief Official White House photographer. Known for his coverage of Obama's administration, he first worked for government in the Reagan years.

15-year-old Trevor Sullivan had a heart transplant after suffering from heart failure. His family continues to work to promote organ donation.

International events have sparked a huge interest in voting during the upcoming French elections. Numbers of first-time voters are surging. CNN's Melissa Bell reports.

Leaders, icons and controversial figures left us in 2016. Here's a look back.

Nick Tullier, the sheriff's deputy of East Baton Rouge, recovers from a police ambush in Baton Rouge that killed three officers.

Republican Rep. Trent Franks walked back comments he made suggesting that Russia hackers were just doing what the American media should have done.