The Pentagon says the new troops will fire artillery rounds at ISIS fighters in support of the local forces who are trying to take back the ISIS capital, Raqqa.
American warplanes targeted terrorist fighters, their weapons and equipment in what may be the first U.S. attack in Yemen since a deadly special operations raid in January.
Witnesses tell NPR about the raid, the military's first under President Trump. It resulted in deaths of a Navy SEAL and civilians. A CENTCOM investigation is underway, but similar raids could follow.
U.S. Central Command says the soldiers were conducting a raid against a local al-Qaida affiliate in the region. A former Yemeni minister tells NPR his granddaughter was also killed in the raid.
The president met with the military brass and signed an executive action that calls for bulking up the military. He also signed a measure that freezes immigration from seven mostly Muslim countries.
The Pentagon said the two ISIS training camps housed fighters who had escaped their former stronghold in Sirte, on Libya's central coast. It added that militants there were planning attacks in Europe.
As President-elect Donald Trump tweets about expanding nuclear security and the cost of combat aircraft, some wonder whether his hardball posts are just "Art of the Deal" tactics to help the Pentagon.
U.S. officials say an unmanned underwater vehicle was seized by a Chinese ship on Thursday, about 50 nautical miles from the Philippines, before the Navy ship operating the drone could retrieve it.
The Pentagon says twice in four days a missile was fired from Yemen at the USS Mason, with no damage to the ship or its crew. An official says the U.S. has destroyed radar locations in response.