Georgetown students helped expose an intricate tunnel system in China that is used to conceal its nuclear missiles.They scoured the Internet and the world for open-source materials to prove their thesis: Google Maps satellite imagery, Chinese blog posts, and a Chinese television show about the Second Artillery (the unit that maintains its nuclear missiles).

The result of their effort? The largest body of public knowledge about thousands of miles of tunnels dug by the Second Artillery Corps, a secretive branch of the Chinese military in charge of protecting and deploying its ballistic missiles and nuclear warheads.
The study is yet to be released, but already it has sparked a congressional hearing and been circulated among top officials in the Pentagon, including the Air Force vice chief of staff.

I wish I could have taken a class like this in college.