A break-in targeting State Department computers worldwide last summer occurred after a department employee in Asia opened a mysterious e-mail that quietly allowed hackers inside the U.S. government’s network. Consumers using the same software remained vulnerable until months afterward.
Despite how hardcore government security is touted to be, we can see that they are just as vulnerable as the rest of us. At one point they had to halt all internet traffic to make sure not too much data leaked!
Source: Yahoo