Watch Thursday, Oct. 1, 2026 at 11:30 p.m. on KPBS TV / Stream with youtube (not available in KPBS+. Artificial intelligence is lowering the barriers to biological weapons, raising new questions about catastrophic risk, global security, and whether governments and tech companies can build effective safeguards before the technology outpaces them. Guest: Annie Jacobsen, Journalist and author of "Biological War: A Scenario."