ISIS

In an unannounced visit, Defense Secretary James Mattis traveled to Baghdad to meet with Iraqi leaders. He arrived during a fight to retake western Mosul, with allies' faith in the U.S. at a low.

It happened on a street filled with car dealerships and garages in the southern part of Iraq's capital city. Islamic State militants claimed responsibility in a statement released on social media.

The top U.S. commander in Afghanistan warns Congress that the war there is deadlocked and he needs more troops and billions more dollars to help allies against insurgents and foreign meddling.

ISIS retook Palmyra from government forces last month. Syria's antiquities chief now reports that the Tetrapylon — a 16-column structure — and the city's Roman theater have been largely destroyed.

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.

The suspect was identified as a citizen of Uzbekistan born in 1983. Istanbul's governor says Abdulgadir Masharipov was trained in Afghanistan and appeared to have entered Turkey illegally.

Police have taken at least 16 other people into custody in connection to the deadly attack, which killed at least 39 people. A gunman shot his way into the club packed with holiday revelers.

Baghdad has seen a spate of deadly ISIS bombings in the last several days. On Monday alone, five blasts rocked the capital city, NPR's Alice Fordham reported.

The U.S.-led coalition fighting ISIS says it launched the strike at the request of the Iraqi military, and that ISIS was using the hospital complex as a command and control center.

More than three dozen airstrikes hit what the coalition thought was an ISIS position in September. But they turned out to be killing troops loyal to the Syrian government, prompting an investigation.