A major terror group,the Islamic State in Iraq and Syria or ISIS, has already taken control of Iraq's second largest city, Mosul, and is threatening to take Baghdad.
This group is so extreme, that even al Qaeda has distanced itself.
Time magazine calls the group's leader "the world's most dangerous man". Others say he's "the next bin laden."
Deborah Feyerick is OutFront with a look at the group fighting for control of Iraq.
Retired Army Colonel Peter Mansoor served as the executive officer to General David Petraeus during the troop surge in Iraq. He tells Erin Burnett why he thinks the U.S. was caught off guard by the recent violence in Iraq.
Protesters took to the streets of Sao Paulo Thursday, angry at the Brazilian government for spending $11 billion on the World Cup instead of using that money for hospitals and schools.
As one group tried to make its way to the Arena Corinthians stadium to protest, police fired tear gas.
CNN's Shasta Darlington and her producer were slightly injured in the clash. Darlington tells Erin Burnett what happened.
It's a growing problem: the influx of undocumented children, mostly from Central America, attempting to cross the southern border into the United States.
Holding centers are at capacity, which has forced the government to open makeshift facilities.
And the problem is not going away any time soon - 60,000 minors, as young as 4, are expected to cross into America this year.
Martin Savidge traveled to McAllen, Texas to get a first-hand look at the crisis.
Sergeant Bowe Bergdahl is returning to the United States, flying to Brooke Army Medical Center in San Antonio, Texas to continue treatment following his nearly five years in captivity.
The news comes as CNN is learning new information about Bergdahl's time as a prisoner and why he may have left his platoon in the first place.
The Daily Beast obtained letters believed to be from Bergdahl that were sent to his parents while he was being held.
OutFront tonight: The Daily Beast's Kimberly Dozier who received the letters by sources in contact with the Taliban and Roy Hallums, an American contractor who was kidnapped in Iraq in 2004 and spent 311 days in captivity.
By now, you've probably seen this incredible version of Celine Dion's "All By Myself" recorded by a guy stuck (alone) in the Las Vegas airport. But it's not the first time someone won the Internet by lip synching.
Here are our five favorites.
"I Want It That Way" –– Backstreet Boys (2005)
Using a low quality web cam in their dorm room, the Back Dorm Boys, a Chinese duo, recorded this version of the Backstreet Boys classic.
"I Want It That Way" - Backstreet Boys (2009)
A different take on the same song, five office dwellers (and one stick-in-the-mud) show us just how fun work can be.
"I Gotta Feeling" - Black Eyed Peas (2009)
In 2009, schools began challenging other schools to lip dub contests. This version of the Black Eyed Peas party classic – performed by dozens of students, all over the school – went viral almost immediately.
"You Make My Dreams" - Hall & Oates (2009)
Different school. Different song. Same awesome result. And they did it in reverse.
"You Bring Me Joy" - Anita Baker (2009); "Can't Tell Me Nothing" - Kanye West (2009); "Not About Love" (2009) - Fiona Apple
Whether he's covering Baker, Kanye or Fiona Apple, Zach Galifianakis' music videos are always fresh, funny and memorable.
What do you think of our choices? Any great ones we missed? Which song would you do? Which song do you think Erin Burnett should try? Let us know in the comments section below.