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Oklahoma city sonic boom tests

1964 FAA sonic boom study over Oklahoma City.

Pronunciation
/ˌoʊkləˈhoʊmə ˈsɪdi ˈsɑnɪk bum tɛsts/
/ˌəʊkləˈhəʊmə ˈsɪti ˈsɒnɪk buːm tɛsts/