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Police arrest a strong person of interest in the killing of the United Health Executive.

And U.S. officials scrambled to understand the groups that may shape Syria's new government

as they figure out just how much influence they might have.

The U.S. is starting from a bit of a disadvantage.

As a former official, put it to me, the Syria issue

wasn't just on a back burner for the Biden administration. Really, the whole stove had been

shut down. Plus, China opens an antitrust probe into U.S. chipmaker NVIDIA.

It's Monday, December 9th. I'm Alex Osala for the Wall Street Journal. This is the PM edition of

What's News, the top headlines and business stories that move the world today.

First, an update on the search for the person who killed United Healthcare CEO Brian Thompson.

Police have arrested on firearms charges 26-year-old Luigi Mangione, whom authorities called,

quote, a strong person of interest in the shooting.

An employee at a McDonald's in Altoona, Pennsylvania, saw Mangiote eating and called the police

this morning.

New York City Mayor Eric Adams praised the employee and law enforcement.

The chief of detectives and the police commissioner made the decision to release as much of a photo that we've, that we had at the time.

We sent it across the country.

And someone and McDonald's employee did something we ask every American to do.

If you see something, say something, but most importantly, do something.

...