While his condition is unclear, a well-placed defense intelligence source told Fox News on Tuesday that the U.S. government has extensive plans in place for when Kim is gone, taking into account all the complications that could arise from his eventual death.

The official described the likelihood of a huge humanitarian crisis within North Korea that could include millions of people facing starvation and a mass exodus of North Korean refugees into China. Intelligence sources told Fox News that part of the plan would be to rely heavily on China to step in and help manage the situation on the ground inside North Korea, partly due to China’s proximity and partly due to logistical challenges of the U.S. providing humanitarian assistance.