Spacewalker Bob Behnken tries to install the materials exposure science package, called MISSE 6, to external brackets on the Columbus laboratory module. Efforts to engage a locking pin on the socket were unsuccessful, prompting the suitcase-size experiment to be returned to its launch carrier on the sidewall of shuttle Endeavour's payload bay.
Source: NASA TV (9 min 28 sec MPEG-4 (H.264) file)
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