HCNN - U.S. carries out airstrikes in Syria after deadly drone attack targets coalition base

Overnight, the Pentagon says it carried out a series of airstrikes in northern Syria in retaliation for a drone attack on a coalition base that killed one U.S. contractor and injured several other service members. NBC News national security analyst Clint Watts explains who the U.S. says was behind the drone attack and why American troops are stationed in Syria.