A 3,000 mile long trail of diffuse atmospheric radioactive contamination produced by the white-hot nuclear powered solid-state scramjet engine, followed by a crash of the spent nuclear fuel into Kamchatka. The crash site will have to be off-limits for millennia, increasingly leaching into the groundwater there with every rain storm and blowing about every dry season.
Is this something like<p><a href="https://en.wikipedia.org/wiki/Boeing_X-37" rel="nofollow">https://en.wikipedia.org/wiki/Boeing_X-37</a><p>just a suborbital variant that carries a warhead?