In the Vehicle Assembly Building's High Bay 3 the yellow framework nicknamed the birdcage.

In the Vehicle Assembly Building's High Bay 3, the yellow framework, nicknamed the "birdcage," lowers Super Stack 5 onto Super Stack 4. Once in position, assembly of the Ares I-X rocket will be complete. The 327-foot-tall rocket is one of the largest processed in the bay, rivaling the height of the Apollo Program's 364-foot-tall Saturn V. Five super stacks make up the rocket's upper stage that is integrated with the four-segment solid rocket booster first stage. 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