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1947 – 1969 · Run B #172
The county's official file, every case the open official indexes name: (1) 5 July 1947, South Bend — press-wave report in the 1947 chronology; no case file, no disposition. (2) 13 October 1948, South Bend — Project Sign case, the Studebaker disc (Brooke and Thompson); strong Sign file, a tentative “Debris?” query in the secondary unknowns catalogue, and not carried in Blue Book's final Unknowns list. (3) 27 April 1950, Goshen–South Bend airspace — TWA Flight 117; Grudge-era file, NICAP AVCAT rating 5, not in the final Unknowns list. (4) 1952, Mishawaka — index case, dated 8 March in the index's own sequence and 8 May in the register's floor, both printed in its article; disposition INSUFFICIENT DATA, this section's own. (5) 23 July 1952, South Bend — Captain Kloth's two objects; disposition UNIDENTIFIED, the county's one official Unknown. (6) January 1957 — index year opened, no county case in the open indexes. The Tribune sky-watch of 31 July–2 August 1952 is carried in this section as a press event and is not counted as a case. The count, then: five cases and one press event across twenty-two years, of which one is an official Unknown, one is insufficient-data, two closed outside the final Unknowns list, and one never became a file. Split by ground, the ledger is this section's central finding: Osceola and Penn Township: zero cases. South Bend's ground: two cases and the wave report. Mishawaka's ground: one case. The airlanes: one case. Every file the Air Force ever opened on this county's sky sits over the cities or the airways between them; over Penn Township's farms, across the whole Blue Book era, the official file is empty — not unexamined, but empty after examination of the indexes whole.
Compiled from the sources of the case articles above: the 1947 wave chronology (NICAP), the Sign case literature, the AVCAT directory, the Blue Book annual indexes (NARA T-1206, Internet Archive), Sparks's unknowns catalogue, and Berliner's unknowns compilation — each read for St. Joseph County place-names.