Last Wednesday, the isolated nation launched a medium-range missile into the Sea of Japan.
The test signaled several things: That North Korea wants to be taken seriously as a regional power, it has weapons capable of hitting distant targets, and—perhaps most seriously—that it is developing stronger nuclear weapons.
And the signs aren’t just out in the water.
From satellite imagery, and other sources, they are looking for evidence that the isolated nation is planning to load a bomb onto a railcar, drive it deep into a mountain tunnel, and detonate—perhaps as soon as April 15, which is the birthday of the nation’s founder, Kim Jung Un’s grandfather Kim Il-Sung.
Soon after last Wednesday’s launch, President Trump told Japan’s Prime Minister Shinzo Abe that “All options are on the table,” in dealing with North Korea.
Whether or not this leads to a full blown crisis, the experts are keeping watch for signals of the test itself.