UC Berkeley College of Engineering dean Tsu-Jae King Liu moderates a virtual panel entitled "Moving the Needle: Berkeley Engineers in Service to Society", with professors Ashok Gadgil (civil and environmental engineering), Ting Xu (materials science and engineering), and professors Rediete Abebe (electrical engineering and computer sciences) as part of Homecoming 2021 activities. (Video by Adam Lau/Berkeley Engineering)