The tugboat and barge transporting the last space shuttle external tank to its display venue in California have reached the inlet to the Panama Canal, now just days away from sailing into the Pacific.
Workers removed the protective wrap that has cocooned space shuttle Atlantis while its $100 million new home was built around it at the Kennedy Space Center Visitor Complex.
This narrated footage shows the preparations that shuttle Atlantis and the mission payloads underwent at Kennedy Space Center for launch on STS-135 to the International Space Station.