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A comment on Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-Breaking Speeds. Parent comment

Re:Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-B... by jazzyjackson on Tuesday February 19, 2019 @06:39PM (#19204139)
relative to their own location Δt ago?
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Re:Boeing 787 Reaches 801 MPH as a Jet Stream Packs Record-B... by cxseven on Wednesday February 20, 2019 @05:32PM (#19212744)
Location with respect to what?
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