ZeroAvia, a sustainable aircraft developer, has been chosen by AFWERX for a grant to investigate the integration of hydrogen propulsion into a Cessna Caravan aircraft for the US Air Force. The study will focus on how hydrogen-electric propulsion and autonomous flight systems can improve unmanned military applications. The project aims to assess the potential of hydrogen technologies in reducing engine noise and thermal signature, enhancing autonomous capabilities, and ensuring fuel supply in challenging operational environments. The feasibility study will examine the feasibility of using hydrogen fuel cell propulsion to enhance air operations while reducing detectability and costs. This initiative, led by ZeroAvia's CEO Val Miftakhov, also involves California-based Reliable Robotics to explore relevant autonomous flight systems. However, challenges such as achieving expected ranges for military UAVs without compromising payload or stealth, as well as the need for investment in hydrogen infrastructure, are expected hurdles to overcome. The collaboration highlights the growing interest in sustainable aviation and the potential for hydrogen propulsion to revolutionize military aircraft technology. By leveraging hydrogen technology, the US Air Force aims to improve the efficiency and effectiveness of its unmanned aerial vehicles, paving the way for a more sustainable and innovative future in military aviation.