I've seen those. Exoatmospheric interception vehicles like that rely on the inertia of a rocket booster stack and the thinness of the atmosphere/gravity when it is released. They cannot accelerate to supersonic speeds at ground-level, and have enough drag that it's probably impossible to break the sound barrier without a payload fairing. I don't think the spheres or tic-tacs are a hard-kill interceptor.
> But Syria et al would have have been the right kind of environment to test results of black projects, no?
Would it? Testing your billion-dollar taxpayer project in sparsely the populated Syrian countryside seems like a great way for ISIS to get their hands on it. Or the Druze, or the PKK, or the IRGC, or any number of other outfits that would sell a crashed interceptor to China in exchange for air defenses and RPGs.
I'm going to go out on a limb here, and suggest that the US prefers to test it's billion-dollar black projects in places where they cannot be stolen, damaged or interrupted.