Nations around the world are investing in Artificial Intelligence (AI) to improve their military, intelligence, and other national security capabilities. Yet AI technology, at present, has significant safety and security issues and AI systems can currently fail in unexpected ways due to a variety of causes. Now, a US defence & foreign policy think tank, the Center for a New American Security (CANS) has announced the creation of a Task Force on Artificial Intelligence and National Security to look into AI's impact both in the US and around the world. This comes at a time when the interactive nature of military competition means that one nation's actions affect others, including in ways that may be detrimental to mutual stability. Currently, there is an urgent need to explore actions that can mitigate these risks, such as improved processes for AI assurance, norms and best practices for responsible AI adoption, and confidence-building measures that improve stability among all nations.