Ongoing crises make it difficult for policymakers to devote sufficient attention to electromagnetic threats, which are less prominent but potentially catastrophic. Events that reflect our growing vulnerability to these threats often slip quickly from the front page, as did the cyberattack against Sony Pictures. Others, such as solar storms across Alaska in March and the accidental power station explosion in April that left Washington, D.C. in the dark, go mostly unnoticed. And even events that dominate headlines, like the Iran nuclear agreement, don't tell the whole story about electromagnetic threats. As a nuclear threshold state, Iran may quickly race to build a bomb that could be used to conduct a devastating electromagnetic attack against the United States.