Secret World War II message baffles European intelligence experts

Despite all our advancements in military intelligence, it turns out a simple coded message can still prove indecipherable. That's what British officials have learned after coming across a secret document from World War II that was attached to a pigeon courier — the skeletal remains of which were recently found in England. The message contains 27 blocks of five letters that would appear totally randomized to most people. Experts at intelligence agency GCHQ don't doubt there's real correspo...