Earlier this month at the National Assembly in Seoul, President Trump highlighted the tragic tale of the “two Koreas” — one free, just and peaceful, the other tyrannical, oppressive and dangerous. This contrast is at the root of America’s most urgent national security challenge. It is also now on vivid display in a South Korean hospital, where doctors are working to save a wounded and malnourished North Korean soldier who defected last week from Kim Jong-un’s slave state.

The defector, whose full name is still not publicly known, risked his life by speeding across the Demilitarized Zone in a jeep, then dashing across the heavily guarded border at Panmunjon. He knew that North Korean troops have shoot-to-kill orders against anyone trying to flee. By the time he made it across, some six bullets had pierced his arms and torso.

South Korean guards rescued him 55 yards south of the border, and doctors soon discovered just how grave his condition was: Along with the bullet wounds, he also had hepatitis B, pneumonia and “an enormous number” of parasitic worms in his intestines, some up to 11 inches long. “I’ve never seen anything like this in my 20 years as a physician,” said his South Korean surgeon. The worms can burrow into fresh wounds, with potentially devastating effects.

This defector’s plight is a window onto North Korean life. For all the regime’s spending on sophisticated weapons, monuments to the Kim family and bribes for elites in Pyongyang, even trusted soldiers suffer terrible malnourishment. A vast majority of other North Koreans endure still worse. Such is the cruelty of North Korea’s regime — and such is the responsibility of those foreign governments that enable it.