We look forward to safely gathering 21-25 April 2024 in National Harbor, Maryland, for SPIE Defense + Commercial Sensing, the most important event for learning about sensing technologies being rapidly acquired and deployed within public, security, and government applications. The 2024 call for papers is now open, and we encourage researchers and engineers to contribute advancements in sensors, infrared, laser systems, spectral imaging, radar, lidar, autonomous systems, and other findings with the community.