Sixteen years after sending troops to Afghanistan, U.S. strategy in that nation is undergoing another dramatic shift.

The plan is known as R4S, which is short for regionalize, realign, reinforce, reconcile and sustain.

This change comes at a time when a number of senators, including Arizona’s John McCain, hit Defense Secretary Jim Mattis and the chairman of the Joint Chiefs of Staff for not working more closely with the Senate on U.S. direction in Afghanistan.

To learn more, I’m joined by Kathy Whitehead via Skype. She is in Afghanistan as head of online for TOLO News.