Chef_Retardee: @Anonymous: You'd need to know something about the planes involved and their performance statistics. It is indeed amusing for those of us who do.
Anonymous4: For the people that don't get it, The Sukhooi T-4 and the North American XB-70 Valkyrie were both aircraft designed to go 3 times the speed of sound, while the concorde was limited to 2.2 times the speed of sound.
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