The 4th Annual H2-Aero Symposium will be held April 2-3, 2025, in Long Beach, California. Like previous meetings, the 2025 symposium will feature two days of groundbreaking presentations with the latest cutting-edge developments by a who's who of the hydrogen aviation and fuel cell community. Presentations on fuel cell aircraft technology, demonstrations and hydrogen hubs for airports will be held on April 2-3. In addition, SAE's AE-5CH Hydrogen Airport Taskgroup will be held April 1. Symposium registrants are invited to attend, at no additional cost.