“Specialized software plays 20 questions with each fragment. What kind of paper is it? What color? Lined or unlined? The computer categorizes each piece to pare down the possible matches. Technicians review the digital reproductions to make sure they’re complete. The original fragments go back into the bag.” Wired Magazine’s Andrew Curry reports on piecing together Stasi files hastily ripped by agents trying to destroy evidence faster than even an army of paper shredders would allow during the fall of the Berlin Wall. A fascinating puzzle story with an excellent photographic essay by Rachel Swaby.