Today at 2 p.m., the entire nation will hear that famous, often annoying, and always poorly timed introduction of the Emergency Alert System simultaneously on all radio and television stations. There will be no place to run, no channel that will give you safety. For 30 seconds, the nation will come together for this first nationwide interruption. Remarkably, a system that has been around for decades has only been tested at the local level.
For more from BostonGlobe.com, sign up or log in below
Access the full articles and quality reporting of The Boston Globe at BostonGlobe.com
Unlimited Access to BostonGlobe.com for 4 weeks for only 99¢.
Get FREE access as part of your print subscription.
Click to continue reading this article or to log in to BostonGlobe.com.