Dr. David Miles, Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites principal investigator and University of Iowa astrophysicist, conducts a mission brief at the Vandenberg Space Force Base Space and Missile Technology Center, Calif., July 21, 2025. During his brief, Miles explained the scientific capabilities of the NASA TRACERS mission, scheduled to launch from Vandenberg SFB July 22, 2025. NASA’s TRACERS mission will help researchers understand magnetic reconnection and its effects on Earth’s atmosphere. Magnetic reconnection occurs when activity from the Sun interacts with Earth’s magnetic field. By understanding this process, scientists will be able to better understand and prepare for the impact of solar activity on Earth. (U.S. Space Force photo by 2nd Lt Andrew Taller)