Life changed as Sadiik Yusuf knew it about two years ago, when the FBI appeared at his front door in Minneapolis to tell him his son Abdullahi had been stopped at the airport, suspected of trying to board a flight that would take him to Syria to fight with ISIS.

On Tuesday, after a less-than-stellar debate performance, Donald Trump returned to using one of his favorite measurements to mask his missteps on Monday night — the polls.

It's believed to be a first — and it certainly came as a surprise: Ancient Roman coins have been found in the ruins of a castle in Okinawa, Japan, that dates to the 12th and 15th centuries. The copper coins were found in 2013; X-ray analysis shows that they bear an image of Constantine the Great.

U.S Secretary of Defense Ash Carter said the U.S. has agreed to send an additional 600 troops to Iraq, in anticipation of the major upcoming operation to retake the Islamic State-held city of Mosul.

These additional troops "will increase the number of U.S. forces in Iraq to around 5,000," NPR's Tom Bowman told our Newscast unit. American troop levels in Iraq peaked at 170,000 in November 2007.

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