What was the primary destination for the cargo delivered during the STS-135 mission?
Answer
International Space Station (ISS)
The main destination for Space Shuttle Atlantis and its final mission cargo was the International Space Station (ISS). The overarching purpose of STS-135 was to deliver the maximum possible supplies and hardware to replenish the ISS inventory before the shuttle's heavy-lift capability was permanently retired after nearly a decade of construction support. While the mission also carried components like the European Robotic Arm (ERA) intended for the Russian segment, the central goal was the general supply transfer to the station as a whole, involving extended time docked to the Harmony module for efficient unloading and loading.

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