This is only a test.

This podcast from LA Theatre Works partially deals with the personalities who recorded public service announcements for CONELRAD (the precursor to the Emergency Broadcast System), including Johnny Cash and Boris Karloff. More CONELRAD-related materials are here, including CONELRAD 100: Atomic Film.

About the image: Bert the Turtle from the civil defense film Duck and Cover (dir. Anthony Rizzo, 1951).