The most worrying aspects of this are (1) that something we should probably expect to be 'secret' is on a system visible to more than 2 and half million people, including junior soldiers and filing clerks, and (2) how easy it was to download all this stuff onto a USB and walk out of the office with it.
Do the CIA, FBI, and Department of Defense, ( they can't even spell correctly ), have any idea of how to secure data held on computers ?