Workers at right watch as a crane lifts the Ares I-X Super Stack 4 into the upper levels for transfer to High Bay 3.

In the Vehicle Assembly Building's High Bay 4 at NASA's Kennedy Space Center in Florida, workers at right watch as a crane lifts the Ares I-X Super Stack 4 into the upper levels for transfer to High Bay 3. There it will be integrated with Super Stack 3. Five super stacks make up the upper stage that will be integrated with the four-segment solid rocket booster first stage on the mobile launch platform. Ares I-X is the test vehicle for the Ares I, which is part of the Constellation Program to return men to the moon and beyond. The Ares I-X flight test is targeted for Oct. 31, pending formal NASA Headquarters approval. Photo credit: NASA/Dimitri Gerondidakis