Terrorists continue to target commercial aviation. Over the past two years, there have been several direct attacks against aircraft, including the 2015 downing of Metrojet Flight 9268 in Egypt and the 2016 attempted downing of Daallo Airlines Flight 159 in Somalia, along with armed landside attacks in Brussels and Istanbul. Intelligence reports also indicate that terrorist groups have improved their ability to hide Improvised Explosive Devices in ways that can fool today’s X-ray scanners by, for example, concealing explosive devices within personal electronic devices (PEDs) larger than a mobile phone. Recently, based on a lack of confidence in existing measures for cabin baggage screening, the authorities have banned PEDs in cabin baggage on routes from ten major Middle Eastern airports to the United States and six departure points to the United Kingdom, creating anger and confusion for travellers. Joe Paresi considers the capability of available technology to resolve regulators’ concerns and keep airline patrons happy.