Dr. Don Perovich holds a plaque in the U.S. Army Engineer Research and Development Center’s (ERDC) Cold Regions Research and Engineering Laboratory’s (CRREL) Gallery of Distinguished Employees in Hanover, New Hampshire, July 15, 2021. CRREL leadership announced Perovich as the newest employee to be recognized in the gallery during CRREL's annual Engineer Day celebration, which provides the opportunity for the laboratory to commemorate employee accomplishments from the previous year. (U.S. Army Corps of Engineers photo by David I. Marquis)