The Pentagon said on Thursday it was reviewing and updating its distribution lists of classified documents.
This meant, naturally, that many more people could now view classified information.
"One of the things we learned from 9/11 is ... we really need to share information," said Michael Atkinson, a former U.S. Intelligence Community inspector general.
But they cannot track co-workers' private online activities - for example, posting classified information to impress others.
"The Insider Threat Program was looking for other Bradley Mannings," said Aftergood.