I want to know the answer to the following question:
How were hackers able to penetrate connected networks?
All the background I'm provided with is that "The intruders were able to obtain classified files, such as air tasking order systems data and furthermore able to penetrate connected networks of National Aeronautics and Space Administration's Goddard Space Flight Center, Wright-Patterson Air Force Base, some Defense contractors, and other private sector organizations, by posing as a trusted Rome center user.". Is that enough to answer the question?
Answer: yes