Soldiers need to be able to communicate on a noisy, dangerous battlefield even when conventional means of communication are unavailable.
To help meet that need, the US Army has just updated its compilation of hand and flag signals.
One configuration of flags signifies “Chemical, biological, radiological, and nuclear hazard present”:

Or a soldier may need to signal “I do not understand,” as follows:

See Visual Signals for Armor Fighting Vehicles (Combined Arms), GTA 17-02-019, US Army, February 2018.
After months of delay, the council tasked by President Trump to review the FEMA released its final report. Our disaster policy nerds have thoughts.
FAS and FLI partnered to build a series of convenings and reports across the intersections of artificial intelligence (AI) with biosecurity, cybersecurity, nuclear command and control, military integration, and frontier AI governance. This project brought together leaders across these areas and created a space that was rigorous, transpartisan, and solutions-oriented to approach how we should think about how AI is rapidly changing global risks.
Investment should instead be directed at sectors where American technology and innovation exist but the infrastructure to commercialize them domestically does not—and where the national security case is clear.
To tune into the action on the ground, we convened practitioners, state and local officials, advocates, and policy experts to discuss what it will actually take to deploy clean energy faster, modernize electricity systems, and lower costs for households.