In this episode of the Voices from DARPA podcast, David Gunning chronicles his three tours of duty as a DARPA program manager (PM), including his latest tour with the Agency’s Information Innovation Office. Throughout his DARPA service, David has combined his training and interests in computer science and psychology in ways that have extended the boundaries of artificial intelligence (AI) technology, both for warfighters and for the general public. During his first tour as a PM in the 90’s, he managed a portfolio of AI projects including the Command Post of the Future (CPoF) program, which delivered technology that was later adopted by the US Army as its Command and Control system for use in Iraq and Afghanistan. During his previous tour, from 2003-2008, David managed the Personalized Assistant that Learns (PAL) program that later led to Siri, perhaps the most famous virtual personal assistant. Now, in his third tour, he is aiming for a new generation of artificial intelligences that earn the confidence of their human users by being able to explain the decisions and actions that emerge from their internal computation. David is delighted that as he works to expand the frontiers of AI, he also will have the privilege of participating in the emergence of a more familiar variety of intelligence in his first grandson, who lives nearby.