Nine out of 10 Americans could die if the nation suffers an attack involving an electromagnetic pulse. The Heritage Foundation’s top foreign and defense policy expert delivered that warning Monday during a presentation to the John Locke Foundation’s Shaftesbury Society.

James Carafano wrapped his comments about EMP around a screening of the movie “33 Minutes: Protecting America in the New Missile Age.” In the video clip above, he explains why we should be concerned about an EMP attack that would disable the American electrical grid and leave the nation powerless.

Click here to access video of the full presentation.