“Instead of allowing all systems administrators [to write data to thumb drives], drop it down to a few and use a two person rule,” said Alexander during a talk at the Aspen Security Forum in Colorado this evening. “We’ll close and lock server rooms so it takes two people to get in there.”

“Since this happened in our place, on our watch, we’re piloting that for DOD and for the IC [Intelligence Community], we will fix this on our stuff and we have a responsibility to do that,” said Alexander.

The Army four-star general was expanding on Deputy Defense Secretary Ashton Carter’s comments earlier today about the security measures DOD is putting in place in the wake of NSA leaker Edward Snowden’s disclosure of secret U.S. electronic intelligence efforts.