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    November 1950. Retrieved 28 May 2013. "ASN Accident Description (Northwest Orient Airlines-2501)". Aviation Safety Network. 23 June 1950. Retrieved 28 May 2013...
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    Smiley, Brenda (November–December 1999). "Sand Creek Massacre". Archaeology. Vol. 52, no. 6. Retrieved December 21, 2022. Gill, Julian (October 8, 2018)....
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    search and rescue mission was not until the disappearance of Northwest Orient Airlines Flight 2501 over Lake Michigan on the night of 23 June 1950. Mackinaw...
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    London. Died: Jane Cowl, 66, American film and stage actress Northwest Orient Airlines Flight 2501, a DC-4 airplane on its way from New York to Minneapolis...
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  • aviation-related events from 1953: The first year in which the world's airlines carried more than 50 million people. Argentina initiates a study of the...
    63 KB (7,768 words) - 21:26, 19 February 2024