Can a person look into the future? The answer to this question will probably be in the affirmative, if we keep in mind the diary of Moscow schoolboy Leva Fedotov, who, 17 days before the war, quite accurately predicted the date of its start and even the nature of the hostilities. Using the example of this document and its analysis, the reader can familiarize himself with the era and a number of documents, not known to everyone, given in the context of the terrible war years.