What part? The job posts are factual. There are still some up on rand career website although the bio specific ones are all filled now. Here is their department page on the subject where they cover the scoping (1). Mirror biology seems like something out of sci fi but it is one of their main efforts it seems so the theory must hold some water. There's also concern about bioweaponry and pandemics. The rest is me connecting the dots.

1. https://www.rand.org/global-and-emerging-risks/centers/ai-se...