The latest incident response report from the Industrial Control Systems Cyber Emergency Response Team (ICS-CERT) — part of DHS — warns of an ongoing cyberattack against the computer networks of US natural gas pipeline companies. The most effective attacks would target the controller of the programmable logic controller (PLC) layer as they are programmed to directly monitor and control physical plant operations. The biggest fear would be a coordinated attack on several facilities which would trigger automatic responses at other facilities, potentially causing a chained effect similar to an electrical blackout.”]