Tom Bowman

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

RACHEL MARTIN, HOST:

U.S. Marine artillerymen are now in place on Syrian soil, north of the last stronghold of the Islamic State. A force of local Kurdish and Arab fighters is moving south, continuing to isolate the city of Raqqa.

They're in the opening stages of a major military operation that officials say could last into the fall.

What comes next is expected to have huge implications not only for the fate of ISIS but also for the relationship between Turkey and Russia, as well as the geographic outlines of the future Syrian state.

It will be very complicated.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

ARI SHAPIRO, HOST:

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

RACHEL MARTIN, HOST:

President Trump has refilled a key position in his administration. He's announced that Lieutenant General H.R. McMaster will serve as his national security adviser. Here's McMaster at Mar-a-Lago yesterday.

(SOUNDBITE OF ARCHIVED RECORDING)

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

ARI SHAPIRO, HOST:

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

STEVE INSKEEP, HOST:

Amnesty International says President Obama was right to commute the sentence of Chelsea Manning.

RACHEL MARTIN, HOST:

House Speaker Paul Ryan says the act was outrageous.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

STEVE INSKEEP, HOST:

Let's get a picture of one of President-elect Trump's most sharply debated new hires.

RACHEL MARTIN, HOST:

He chose retired Army Lieutenant General Mike Flynn as his national security adviser.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

RACHEL MARTIN, HOST:

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

ARI SHAPIRO, HOST:

Donald Trump announced his choice to be defense secretary.

(SOUNDBITE OF ARCHIVED RECORDING)

DONALD TRUMP: We are going to appoint Mad Dog Mattis...

(CHEERING)

TRUMP: ...As our secretary of defense.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.

DAVID GREENE, HOST:

Pages