It’s easier for American tourists to travel to North Korea than to Cuba. It’s also more dangerous, as the death this week of college student Otto Warmbier after 17 months of North Korean captivity shows. But never mind the absurdity of President Donald Trump’s reimposition of travel restrictions to a relatively open and safe island 90 miles off the American …

The North Atlantic Treaty Organization (NATO) has now formally enlisted in the fight against IS extremists. It can begin by helping to stem the flow of refugees trying to reach Europe from North Africa. This would be more than a humanitarian exercise; it would be a counterterrorism operation. Wherever refugees gather in hopelessness, violent extremists have a fertile recruiting ground. …

In environmentalist circles, there’s a common trope that for humanity to prevent catastrophic climate change, economic growth must stop. This idea has helped to turn what should be a hard-headed, rational debate into a partisan political one — many on the right suspect that climate-change activism is a thin veneer for a socialist plot to throttle the economies of the …