hypersonic

Although I could imagine an enemy detecting multiple of these hypersonic vehicles heading towards it, wouldn't want to wait to find out.

A meteorite would be hypersonic when first entering the atomsphere and then supersonic the rest of the way until maybe a few hundred meters before impact.

And you don't have a whole lot of time to acquire GPS lock, or steer, when you're still traveling at hypersonic speeds and it takes maybe half a minute to hit the ground after first encountering the upper atmosphere.

The future is moving towards hypersonic platforms to deliver extremely-rapid strikes that rely on speed to penetrate highly defended targets.

And here's the big problem for a Skylon spaceplane, rockets are fairly simple systems whereas hypersonic airbreathing engines are extraordinarily complex and difficult.

I'm not that familiar with military aircraft development timelines, but this stuck out as my favorite part:A hypersonic plane does not have to be an expensive, distant possibility.

Back when people thought "hitting a bullet with a bullet" type of kinetic intercept was hard, what they did not realize is that the software is relatively straightforward and even primitive computers are fast enough to do hypersonic intercept.

It failed for political and sociological reasons, but hypersonic airplanes were set to revolutionize air travel until it became politically unpopular to support.

If you store your writing on a 3rd party site like blogger, livejournal or even on your own site, but in the complex format used by blog/wiki software de jour you will lose it forever as soon as hypersonic wings of internet labor flows direct people's energies elsewhere.