Ashutosh Jogalekar at the Bulletin of the Atomic Scientists:
For those contemplating mass casualties, biotoxins like ricin are easy to produce. But delivering them effectively is difficult, requiring specialized techniques like aerosolization. Conversely for chemical warfare agents like sarin, synthesis (because of restricted precursors) has traditionally been the hard part, even if delivering them does not require specialized methods.
However, that balance is tipping because of advances in artificial intelligence. Generative AI and off-the-shelf computational tools are collapsing the precursor barrier, making DIY sarin analogs (compounds that resemble the molecular structure of sarin) as attractive as castor-bean mash for rogue individuals. These applications can make the synthesis and use of nerve agents for nefarious purposes marginally but consequentially more probable.
More here.
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