Recently, there's been modest but alarming outbreak of gun attacks on substation transformers. These critical devices account for fewer than 3% of the transformers in U.S. substations, but they carry as much as 70% of the nation’s power, according to a 2014 report by CRS. ABB worked with electric utilities and the U.S. Department of Energy to come up with the Substation Physical Security and Resiliency Initiative, which lays out a five-step approach to shielding electric transmission and distribution systems against attacks, as well as natural threats. | 
