I see these shipping casks on the highway at least once a month.  This time I had a Canon with me (Powershot A470, you know, a camera). While sitting at the off-ramp stop light next to this container I began to wonder how much activity shines through the shielding. I began to daydream … if I could see in the gamma spectrum, would this thing be bright or dim?

Then, in the blink of an eye the spell was broken. The light turned green and I parted company with this hot little number.