Online Engagement Richard Kidd, deputy assistant secretary of defense for environment and energy resilience, chaired the Defense Department's first online community engagement event to discuss issues related to per- and polyfluoroalkyl substances, June 23, 2021. SHARE IMAGE: Download Image: Full Size (3.99 MB) Photo By: Marine Corps Sgt. Taryn Sammet VIRIN: 210714-D-ZY556-0015.JPG Photo Gallery