Regardless of whether or not gravitons actually exist, it is feasible that the US government will want to signal to adversaries that they do have this technolog

Regardless of whether or not gravitons actually exist, it is feasible that the US government will want to signal to adversaries that they do have this technology. After all, a deterrent is useless if your adversary doesn't know it exists. You can't be deterred by something you don't know about.