US intelligence officials have struggled to respond to China's decade-long hacking campaign, finding themselves one step behind China's efforts (Zach Dorfman/Foreign Policy)

Zach Dorfman / Foreign Policy:
US intelligence officials have struggled to respond to China's decade-long hacking campaign, finding themselves one step behind China's efforts  —  It was a radically mistaken assessment.  But even inside the U.S. government, knowledge of China—and its intensions—was at a low point.