What’s it like to walk the entire length of China’s Great Wall?

On a warm spring morning in 1984, Dong Yao-hui and his two young friends, Wu De-yu and Zhang Yuan-hua, pulled on military surplus backpacks and boots and set out on a hike along a stretch of the Great Wall of China.http://rss.cnn.com/~r/rss/edition_travel/~3/pegqqTViDcI/index.html