A MILITARY HELICOPTER was on the ground when Russell Guy arrived at the helipad near Tallinn, Estonia, with a briefcase filled with $250,000 in cash. The place made him uncomfortable. It didn’t look like a military base, not exactly, but there were men who looked like soldiers standing around. With guns.
The year was 1989. The Soviet Union was falling apart, and some of its military officers were busy selling off the pieces.
This article details one of the most ambitious—and secretive—cartographic endeavors of all time and how it came to light in the West. Continue reading at Wired, where it was originally published.