I'm Al Lettson, host of Reveal.

From central Mexico to the front lines of Ukraine.

We were given an order not to take any prisoners.

From an abortion clinic in Florida,

a woman was just assaulted.

To the streets of Chicago.

More than 2,000 kilograms of heroin

came to Chicago.

Reveal is your weekly dose of investigative reporting.

Somebody has to say something.

Subscribe to reveal wherever a dozen police fans. 100 days before the Olympic Games are set to begin.

A dozen police fans pull up to an abandoned office building in Vitri Corsen.

Officers break through locked doors and search the premises floor by floor.

Some of them wear masks and carry riot shields. I said this building was abandoned. I didn't say it was empty.

For three years the site has been home to hundreds of migrants, men, women and children fleeing war and

disaster. Like Nada, she and her family fled civil war and made their way to France.

Hello, my name is Nada.

I'm 18 years old.

I'm in high school and when it's possible I want to become a nurse later on.

We had a home in Sudan but because of the war everything was destroyed.

Nauta says her father was the first to arrive in Paris three years ago. After securing a job in construction he

applied to bring his family to. Nada and her mother joined him last year and

...