it's pretty damn fast but I'm not too sure we'll see that in our lifetime, at least on a commercial basis. Also, it is my understanding that the actual maximum speed of the SR71 is quite a bit faster than the one they confess to, I'm not much of a conspiracy theorist, but it was probably Top Secret for a reason (off hand, I'd say at least Mach 5). On another note, there's almost nothing being made of the swan song for the B-52 in NASA service, you'd think after 40 years of service that someone would say something.
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"Religion is the one area of our discourse in which it is considered noble to pretend to be certain about things no human being could possibly be certain about"
--Sam Harris
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