Inside Astrotech's Hazardous Processing Facility, technicians check the Dawn spacecraft as it is lowered onto a scale for weighing. Next, Dawn will be prepared for fueling. Dawn is scheduled to launch June 30 aboard a Delta II rocket from Launch Complex 17-B at Cape Canaveral Air Force Station. Dawn's mission is to explore two of the asteroid belt's most intriguing and dissimilar occupants: asteroid Vesta and the dwarf planet Ceres. Photo credit: NASA/Charisse Nahser