Space Shuttle Discovery is Hoisted and Mated to the External Fuel Tank, Ken Kremer for SpaceRef
"Space Shuttle Discovery was hoisted and "hard mated" to her fuel tank and twin rocket boosters for the final time on Saturday (Sept. 11), before she is retired from active duty service following her last scheduled flight - the STS 133 mission to the International Space Station (ISS)."
Marc's note: Ken's report includes some great photographs of the event.