Shortly before berthing, Endeavour performed a nine-minute back-flip, known as a rendezvous pitch manoeuvre, allowing the ISS crew to capture up to 300 photographs of the shuttle's thermal protection system.

BBC: Shuttle crew welcomed aboard ISS

Before the shuttle docked, it did a nine-minute backflip so station astronauts could take high-resolution pictures of the shuttle's thermal-protection system, NASA said.

CNN: Endeavour docks with space station