Austin Davis, now of the U.S. Army Engineer Research and Development Center’s (ERDC) Geospatial Research Laboratory, was part of an ERDC Environmental Laboratory Environmental Systems Branch team that developed an electronic collimator invention that detects gamma radiation, a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. The invention enables the warfighter with a detector capable of directional detection without the use of shielding. (U.S. Army Corps of Engineers photo)