The U.S. Department of Homeland Security has published a web site full of instructions for how to Be Ready for any manner of terrorist attacks. The instructions are illustrated with the same sort of images you might see in a plane emergency card… take for example this icon used in the First Aid Kit section:

The first aid kit example is pretty clear. Others are less so. In response, one thoughtful individual has taken it upon himself to attach some appropriate captions to some of the more ambiguous images found on the site. As a sort of public service. In the interest of education. Really.

(Thanks to Susan for sending this my way.)