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USPS replacing universal keys to deter letter carrier robberies - CBS Boston
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A Key to the City? Thieves Again Appear to Use USPS Key to Enter Chicago Buildings – NBC Chicago
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Postal Service replacing universal mail keys - YouTube
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Master key to Covington's mail boxes stolen from USPS mail carrier
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Community mailboxes found open with master key inside | CBC News
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Thieves Keep Using Postal Master Keys To Steal Mail: How Are They Getting A Hold Of Those Keys? - CBS Chicago
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