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The U.S. military has been chasing ultraviolet (UV) communication for decades. Now researchers say radios that communicate using UV light are finally within reach. Working with the Army Research Lab (ARL) in Adelphi, Md., these researchers are mapping out the steps needed to commercialize UV radios. TheyÂ¿ve reached the last piece of the puzzle: untangling the poorly understood, extraordinarily complex way ultraviolet light scatters. If they can do that, they will have unlocked the secret to a new form of non-line-of-sight communication.