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The present Research Memorandum and its supplement report case studies of a large number of actual or alleged overflights which have occurred during the period 1930 to 1953. An effort has been made to collect detailed information about as many cases as possible of peacetime overflight, especially about those that occurred between the end of World War II and December, 1953. Systematic research on this kind of problem involves many difficulties, however, and the present compendium is incomplete in several respects. Not every case of overflight has been covered, the information obtained on many cases is sketchy, and, even when it is reasonably complete, there often remain important unanswered — perhaps unanswerable — questions.

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This report is part of the RAND Corporation research memorandum series. The Research Memorandum was a product of the RAND Corporation from 1948 to 1973 that represented working papers meant to report current results of RAND research to appropriate audiences.

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