The transatlantic alliance has begun to connect its traditional security interests in Europe with the geopolitical dynamics in the Indo-Pacific region, including tensions between China and Taiwan.

With the Castro era coming to a close in Cuba, it may be time for President Donald J. Trump to take back some of his predecessor’s concessions to Havana.

Governments and companies are embracing new emissions-reducing technologies that pull carbon dioxide out of the atmosphere. But it is uncertain whether this can work at the scale and in the time nece…