An FBI Hazardous Evidence Response Team member places the location identification tag on debris collected at a contamination point in Glendale, Ariz., April 7, during Prominent Hunt 21-1. Prominent Hunt 21-1 is part of a series of annual exercises designed to provide a realistic opportunity for an interagency team of specialists to practice and enhance their operational readiness in the event of a nuclear detonation on United States soil or abroad. (U. S. Army photo by Clem Gaines)