Planetary defence was a key theme throughout the second public day of the International Paris Air Show 2025. Ian Carnelli, Project Manager of ESA’s Hera mission, and Patrick Michel, Hera Principal Investigator at the National Centre for Scientific Research (CNRS), took part in the closing Astro Classe “Asteroid Alerts and Planetary Defence” at the Agora, moderated by ESA’s Public Relations Officer, Julie Briere.