A crane lowers the Ares I-X Super Stack 4 onto Super Stack 3 for integration.

In the Vehicle Assembly Building's High Bay 3, a crane lowers the Ares I-X Super Stack 4 onto Super Stack 3 for integration. 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/Jack Pfaller