- Discussion of the “Slaughterbots” short film and the campaign to ban lethal autonomous weapons, with participants debating whether a 3 g shaped-charge warhead can deliver energy equivalent to a 9 mm bullet and how difficult it would be to defend against palm-sized killer drones.  
- Cost and manufacturing analysis: shaped charges require high-precision machining and are less efficient than a single-use plastic gun firing a real cartridge; at garage scale the latter is cheaper, while at industrial scale shaped charges may win.  
- Personal-security brainstorming included ballistic helmets, anti-drone nets, point-defense lasers, and the half-serious suggestion that widespread fear of assassination could accelerate research into brain uploading and off-site backups.  
- Links shared: the “Slaughterbots” video (https://www.youtube.com/watch?v=HipTO_7mUOw), the Campaign to Stop Killer Robots (http://autonomousweapons.org), and a Mother Nature Network piece on bullet-proof bioengineered skin.  
- nmz787 reported progress on using SAT solvers (MonoSAT, CryptoMiniSat) for PCB routing and formal verification, noting new 22-core/64 GB RAM hardware and interest in GPU-accelerated SAT techniques.  
- Open-source ultrasound project Murgen re-posted: Hackaday page (https://hackaday.io/project/9281-murgen-open-source-ultrasound-imaging) and GitHub repo (https://github.com/kelu124/murgen-dev-kit).  
- Brief exchange on pandemic preparedness: fenn asked superkuh about H7N9 influenza; superkuh admitted letting his 2010-era stockpile dwindle, while nmz787 keeps two weeks of water plus beans and rice.  
- heath circulated the paper “Sealed Glass Proofs” (https://eprint.iacr.org/2016/635.pdf) as a cryptographic primitive of renewed interest.