Was it an earthquake—or a hidden nuclear test? This program examines the detention of Chinese American seismologist Chen Youlin, the secret algorithms used to distinguish natural earthquakes from underground explosions, and new U.S. allegations that China may have conducted a concealed low-yield nuclear test at Lop Nur. We also look at China’s underground nuclear facilities, the mystery surrounding the 2008 Wenchuan earthquake, and why one missing scientist may hold the key to understanding China’s hidden nuclear strategy.

Source: A Missing Scientist and China’s Underground Nuclear Secrets