On the EdgeA pioneering examination of history, current affairs, and daily life along the RussiaChina border, one of the world's least understood and most politically charged frontiers. The border between Russia and China winds for 2,600 miles through rivers, swamps, and vast taiga forests. It's a thin line of direct engagement, extraordinary contrasts, frequent tension, and occasional war between two of the world's political giants. Franck Bill and Caroline