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The International Spy Museum (SPY) launches a mini pop-up exhibit, Codes, Ciphers, & Mysteries: NSA Treasures Tell Their Secrets, from April 5 through May 31 to showcase a select trove of key artifacts used for codemaking, codebreaking, and secure communications. The 13 historic objects are first-of-their-kind, one-of-a-kind, and breakthrough pieces, some of which have played a key role in shaping world history. The remarkable items are on loan from the NSA’s National Cryptologic Museum (NCM).