On the AST Cybersecurity podcast with Ravi Das, Jon Baker, and Suneel Sundar of MITRE's Center for Threat-Informed Defense discussed open-sourced tools that cyber professionals can employ to ramp up their threat-informed defense. The Center is celebrating its 5th anniversary of elevating the state of the art and state of the practice in threat-informed defense. Its recent work like Mappings Explorer can help cyber defenders better use MITRE ATT&CK®. Recently the Center worked with its members to develop new resources for MITRE ATLAS™.