Shielding is one of the important design strategies that engineers can use to achieve EMC compliance and protection against Electromagnetic Environmental Effects (E3). Any practical shield used in electronics systems will contain apertures; ventilation holes for thermal cooling, joints in enclosure panels, seams around connectors and other plug-in components. The body of a car or airframe of an aircraft can provide some measure of shielding, but this is compromised by doors, windows, access panels and components interfaced to the airframe such as antennas used for communication and navigation. Composite materials are increasingly used in vehicular applications due to their relatively light weight, but this creates additional challenges for maintaining shielding integrity, such as the direct diffusion of currents through the material in situations such as a lightning strike. ...