In Hangar M on Cape Canaveral Air Force Station, a worker guides a transporter into place to receive the Delta II first stage. The Delta will be moved to the launch pad. Dawn's mission is to explore two of the asteroid belt's most intriguing and dissimilar occupants: asteroid Vesta and the dwarf planet Ceres. Dawn is scheduled to launch June 30 from Launch Complex 17-B. Photo credit: NASA/Jack Pfaller