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From this articleI'm assuming Mach-21 is the road map for the 21st century, not a Mach 21 aircraft. Someone would have heard or seen that! It's just written poorly to make it sound like we're developing a whole bunch of Mach-21 aircraft. Of course, there is the new reusable launch vehicle from Boeing.
From this article
I'm assuming Mach-21 is the road map for the 21st century, not a Mach 21 aircraft. Someone would have heard or seen that! It's just written poorly to make it sound like we're developing a whole bunch of Mach-21 aircraft. Of course, there is the new reusable launch vehicle from Boeing.
