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Welcome back to the National Cipher Challenge, I can’t believe we are now in the 18th year of the competition. Back in 2005 we travelled with Harry deep under the Arctic to the Lomonosov Ridge, as he worked to recover a Soviet spy satellite that had crashed in the northern waters. The mission took place in 1957 and this year’s competition starts as Harry returned to the US to receive his new assignment. You will be working with him to … Read on