Trump said he would take a new approach to Kim Jong Un. "I would speak to him," he said.
Experts weigh in on whether the U.S. faces a nuclear threat after North Korea successfully tests its first intercontinental ballistic missile.
Russian fighters successfully targeted Islamic State militant group positions in Syria with Moscow's newest Kh-101 long-range cruise missiles.
The country could now be capable of hitting the U.S. mainland.
NATO members in the Baltics have grown concerned over Russia's drills and jet flights in the northeastern European region.
Trump and South Korea's Moon meet in the shadow of the death of Otto Warmbier.
Ronald Reagan and Mikhail Gorbachev signed the Intermediate-Range Nuclear Forces Treaty in 1987. Now Republican hawks want to scrap it.
U.S. officials say new activity at North Korea's nuclear weapons test site indicates the country may be preparing a launch during top U.S.-China talks.
South Korea has fast-tracked the plan after a series of missile tests by Pyongyang.
"I believe it is quite clear that they have a heavy responsibility in the process that led to Mr. Warmbier's death," Moon Jae-in said.
The 22-year-old University of Virginia student was sentenced to 15 years' hard labor.
The North's most recent test launch of a short-range ballistic missile on Monday landed in the sea off its east coast.
Trump promised to rebuild the military. So far, that's not happening.
Russia's decision last year to deploy of the Iskander-M to a region bordering Poland and Lithuania prompted concern among both NATO allies.
President told South Korea's envoy that U.S. was willing to resolve the nuclear crisis through talks.
Moscow has deployed at least two cruise-missile armed frigates and intel ships.