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The memos indicate that Kater, of whom little is revealed, sent letters to dozens of news organizations and the FBI beginning in 1959 and through at least 1963.

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On average, patients in the Lucentis group could read seven more letters on an eye chart than they could at the beginning of the experiment.

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On two occasions -- in the 1980s, and again at the beginning of this century -- Sioux City earnestly and formally petitioned the Federal Aviation Administration to change the letters.

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