Keith B. Alexander: “We are extremely vulnerable to any form of terrorism by virtue of cyber means.”

We see this as two roles: defend the Nation and protect our civil liberties and privacy.

We need to up that defense. We need to share information so that DHS can do the job that I believe it is there for.

Great harm has already been done by opening this up, and the consequence I believe is our security is jeopardized.

Cyber espionage has caused the 'greatest transfer of wealth in history.'