Marcel Stieber, AI6MS, contributed three talks to the QSO Today Virtual Ham Expo earlier this month, on topics that included remote administration of amateur radio exams, wireless networks for emergency communications, and lithium batteries and their care and feeding.  He uses his amateur radio license and the opportunities it affords to advance the state of the art, contribute to his community, and to share with all of us.  AI6MS is my QSO Today.