Former NSA contractor Edward Snowden was able to gain access to classified information using a co-worker's login credentials, which led the employee to lose his security clearance and later resign.
Snowden reportedly tricked an employee to use his login credentials on Snowden's computer, and while he was unaware of Snowden's intentions, still didn't "comply with security obligations."
A U.S. lawmaker added: "Unbeknownst to the civilian, Mr. Snowden was able to capture the password, allowing him even greater access to classified information."
In addition to the former NSA civilian contractor, a current active duty U.S. military member and another contractor lost NSA access privileges. The U.S. government is trying to accurately identify how Snowden collected so many documents which were shared with international reporters - and to prevent a similar incident from taking place again in the future.