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Anonymous NASA engineer sends Portal 2 reference to spaaaaaaaace

Without giving any spoilers, those who've finished Portal 2 should check out this post on the game's blog which details the efforts of an anonymous NASA engineer in laser-engraving a tribute to Valve's puzzler on an ISS re-supply vessel. This is adorable, but does not have NASA's official sanction, so we may never know who is responsible.

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