What U.S. forces are doing in Niger, site of deadly ambush

Aired: 10/5/2017 | 0:05:11 | Clip
Three U.S. special forces soldiers were killed and two more injured on Wednesday while on a training mission with the military of Niger. The soldiers were reportedly caught in an ambush not far from the Malian border, where al-Qaida and Islamic State militants have been active. Judy Woodruff learns more from Peter Pham of the Atlantic Council.