New Mars

First flight tests of Italy’s 8m supersonic glider are expected soon. This prototype is part of an ESA RLV research project.

More details here

That's very spiffy, but about 20 years too late, the USAF developed and likely briefly deployed a weapon system in white world papers referred to as the Hypersonic Glide Vehicle. The idea was basically you hang several solid rockets with lifting body encased warheads off the side of a B-52, which heads to 40,000 feet, the solid rockets light off and send the Warheads on their way which then separate at half way to their target and glide at over mach 9 the rest of the way. The idea being that they could go through early warning radars undetected and maneuver their way around ABM defenses.

When the program was run in the mid to late 1980s it was SAR which is why you likely haven’t heard of it, now details are slowly starting to leak out.

Well, it basically needs to be about ten times faster to be a workable space vehicle too.

USV succesfully launched - February 2007

I got the impression from reading the attachments that it's a research vehicle preliminary to an eventual fly-back booster--not a space vehicle.

And that would make some sense, like replacing the SRBs on Ariane rockets... if they had a good reason to fly more often.

Not big on wings on rockets these days.