"How damaging to national security is Chinese espionage?
When the question was put to FBI director Robert S. Mueller III at a 2007 hearing of the House Judiciary Committee, he replied: "I can probably say more in a classified setting."
"I can say that it is a substantial concern. China is stealing our secrets in an effort to leap ahead in terms of its military technology, but also the economic capability of China.
It is a substantial threat.""