[url=http://www.bungie.net/News/Blog.aspx?mode=news#cid32192]Let's open the Sack[/url].
As for the challenge, guessing at Bungie Lore won't be enough. We want to see your problem solving mojo. Team up if you will, but a winner is just a guesser without documentation of how they solved the puzzle.
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Could it be a timeline, showing the path of Bungie up until now? Or up until Aerospace? If i remember correctly, the term "Bungie Aerospace" and Per audacia ad astra were used frequently together.