English: QR code on a cenotaph in the Congressional Cemetery in Washington, DC, a National Historic Landmark. This code, a simple inexpensive xeroxed laminated piece of paper, has been outside for about nine months and still works. It is by far the worst example of the 60 QR codes placed outside in the Cemetery, which have gone through Hurricane Sandy and a couple of snowstorms. It obviously needs to be replaced at this point, but shows that this type of inexpensive QR code can last 9 months
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