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The last Sept 19, at: 07:45 GMT Houston, TX, The mystery object appears on video taken by a shuttle camera. It has been described as small and dark, and coming possibly from the ship's payload bay.

It was noticed as astronauts were testing the vehicle's jets in preparation for the return to Earth.
www.siderum.com

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from CNN "Nice to be back. It was a great team effort," said commander Brent Jett immediately after touchdown at Kennedy Space Center at 6:21 a.m. EDT.

in case you want to do a touchdown chart. Granny