In a test of the X-51A jet last week, it reached speeds of mach 5 for over three minutes, the longest hypersonic flight by a factor of ten. What do you think?


"It must have been so cool when the phrase 'Holy shit!' finally caught up to the jet 15 minutes later."

Erin Kramer • Systems Analyst

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"That's amazing! Now when it comes to what we use that sort of thing for, what exactly do we use that sort of thing for?"

Bart Magnuson • Signaler

"What? I'm sorry you'll have to speak up. Yesterday this thing going at mach 5 flew over my house."

Martin Licht • Vegetable Sorter