FBI security breach- how does this happen?

Washington Post: “A government consultant, using computer programs easily found on the Internet, managed to crack the FBI’s classified computer system and gain the passwords of 38,000 employees, including that of FBI Director Robert S. Mueller III… [Joseph Thomas Colon], 28, an employee of BAE Systems who was assigned to the FBI field office in Springfield, Ill., said in court filings that he used the passwords and other information to bypass bureaucratic obstacles and better help the FBI install its new computer system. And he said agents in the Springfield office approved his actions.”

It is amazing to me that this could occur at the FBI. Not the technical aspect of the hacking, but rather the acknowledged breach of policy that was allegedly known to agents in the local office where the breaches occurred. This seems totally inexcusable in a place like the FBI where information security in all of its aspects should be top of mind for every employee every day. It shows me that the biggest issues with security continue to be lack of awareness, even moreso than technology issues/limitations.