Dr. James H. Crawford of NASA Langley Research Center is recognized with the AGU Ambassador Award for pioneering and leadership in airborne research programs, fostering global collaborations, and inspiring the next generation of scientists. For over three decades, Dr. Crawford’s leadership in the global Earth science community has been exemplified through his pivotal role in airborne research and observation programs. His tireless efforts have led to large international cooperative studies, advanced inclusive community science, built capacity across diverse groups, and bridged the gap between science and policy, all while he has nurtured scientific talent around the world. Dr. Crawford’s distinguished career is defined by his groundbreaking work in atmospheric research, particularly through airborne field studies. Since the 1990s, he has provided key leadership in a dozen major field campaigns, spanning environments from heavily polluted urban centers to pristine remote regions, fostering close collaborations across multiple nations. His work has had a profound global impact, especially in addressing air quality challenges in Asia, where air pollution affects more than half the world’s population. Notably, he led two landmark international field projects over Asia, KORUS-AQ and ASIA-AQ, which brought together scientists, engineers, academics, government officials, policymakers, and media representatives from across the region. These initiatives have not only deepened scientific understanding of air pollution problems but also influenced policy decisions and raised public awareness, signifying how scientific leadership can translate knowledge into tangible societal benefits. Dr. Crawford’s service to the Earth science community is equally exceptional. He has served as cochair and member of the scientific steering committees of the International Global Atmospheric Chemistry and Atmospheric Composition and the Asian Monsoon programs. As editor of AGU’s Journal of Geophysical Research: Atmospheres and as NASA’s Tropospheric Chemistry program manager, he has strengthened cutting-edge research and communication within the scientific community. A dedicated mentor, Dr. Crawford has guided numerous students, interns, postdoctoral fellows, and early-career scientists from communities worldwide, providing both inspiration and opportunity. Some of his mentees have emerged as leaders in atmospheric science, continuing his legacy of scientific integrity, collaboration, and public service. In short, Dr. Crawford’s vision, leadership, and commitment to collaboration and mentorship embody the spirit of the AGU Ambassador Award and AGU’s mission “to advance discovery in Earth and Space sciences for the benefit of humanity and the environment.” —Mian Chin, NASA Goddard Space Flight Center, Greenbelt, Marylan