U.S. Army Engineer Research and Development Center , Construction Engineering Research Laboratory (CERL), structural engineer Jim Wilcoski briefs the Principal Deputy Assistant Secretary of the Army for Installations, Energy and Environment Bryan Gossage on the capabilities of the Triaxle Earthquake and Shock Simulator, or TESS, in Champaign, Ill., Oct. 30, 2020. TESS is used to create test environments that mimic earthquakes, vehicle vibrations, and shock motions due to blasts. Analysis conducted on the TESS allows engineers to identify and define vulnerabilities to motions, investigate shock survivability of equipment and structures, and develop mitigation strategies.