A recent report/guide issued by the Department of Commerce's National Institute of Standards and Technology, has gone over several ways in which hackers, or terrorists could harm defense manufacturers for the US Military, both physically, and from a production standpoint. Through attacks on systems, as well as hacking into hard drives and networks it is possible for terrorists to harm us from afar. More details on what can be done to prevent this, and what actually our fears should be can be found here: http://3dprint.com/14970/3d-print-hack-terrorism/

Should this be a fear of the US Government and other governments as 3d printing begins to take over manufacturing floors?