TOWARDS TRUSTWORTHY AI-BASED SYSTEMS -- CHALLENGES, PROGRESS, AND PROSPECTSAI capabilities, and particularly machine learning (ML), crossed a scaling threshold a decade or so ago, and have since become a significant source of capability in a wide range of systems and in diverse sectors. In this talk, building on perspective granted from sixty years of DARPA investment in AI capabilities, we review the progress and prospects for AI-based systems, with emphasis on potential pathways to more trustworthy and reliable AI-based systems. This drives us to consider how we can combine advance of AI capabilities with advances in the development of high-assurance software. Emerging techniques for high assurance development give a reason for optimism.Register to The DEVOPS Conference 2022, and watch all speeches from The DEVOPS Conference 2021 at: www.thedevopsconference.com/