U.S. President Donald Trump signed an executive order March 26 outlining the administration's policy pertaining to the threat of an electromagnetic pulse (EMP). The policy mandates that a variety of government agencies coordinate with the private sector to warn of an impending EMP, and to take measures to prepare for, protect against, respond to and recover from an EMP event — outlining specific tasks for the departments of Homeland Security, Defense and Energy, among other agencies. Per the new mandate, the secretary of Homeland Security — in consultation with the aforementioned government agencies, organizations and private sector partners — will now submit regular reports to the U.S. president that not only analyze the technological options available to improve the resilience of critical infrastructure to the effects of EMPs, but identify gaps in available technologies to help guide research and development efforts.