The current US flag was designed by a high school student.
Why it is true
In 1958, 17-year-old Robert Heft designed the 50-star flag for a school project. He got a B- initially, which was changed to an A after it was adopted.
Source: History
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This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.