Heidi Shyu Heidi Shyu, the undersecretary of defense for research and engineering, speaks to Thom Shanker, the director of the Project for Media and National Security and the Defense Writers' Group, virtually from the Pentagon, Jan. 13, 2022. SHARE: Download: Full Size (5.58 MB) Credit: Marine Corps Sgt. Taryn Sammet VIRIN: 220113-D-ZY556-0011.JPG Photo Gallery