A U.S.-North Korean summit could help the U.S.-China relationship find new momentum and purpose.

A new compilation of data gives insight into the African Islamist insurgency’s reach, tactics, and evolution. It reveals a far higher victim count than previous estimates.

China has 800 million Internet users and is overtaking the United States in areas such as drones, mobile payments, bike sharing and artificial intelligence. But Trump is responding to the China chall…

If 2018 was a year marked by international challenges that percolated but did not boil over into full-blown crises, next year may well be the year in which that good fortune runs out.

President Trump doesn’t have much in the way of kind words for the transatlantic alliance. As a candidate, Trump called NATO “obsolete.” As president, he has reportedly asked aides why the United Sta…