There is nothing of honour here If you look at it just right, the universal radiation warning symbol looks a bit like an angel. The circle in the middle could indicate the head, the lower part might be the body, and the upper two arms of the trefoil could represent the wings… The U.S. Department of Energy has been grappling with that problem recently, as they designed the warning markers to use at Yucca Mountain and at the Waste Isolation Pilot Plant (WIPP) nuclear waste storage facilities.