Two researchers with the U.S. Army Engineer Research and Development Center’s Cold Regions Research and Engineering Laboratory assemble a newly engineered automated terrestrial laser scanning system (A-TLS) at Husky Drop Zone on Eielson Air Force Base, Alaska. The A-TLS is installed on a 12-foot-tall tower affixed with multiple lidar laser scanners, meteorological sensors and solar panels. The system will help determine how underground permafrost changes the landscapes above by capturing precise lidar scans which can detect any gradual caving or sinking of the surface area as a means of assessing and validating satellite-based assets for continuous monitoring of permafrost environments globally and will be taking scans of the Alaskan tundra until October 2022. (U.S. Army Corps of Engineers Photo by Adam LeWinter)