No - it's strange that it's only been observed in the US and all the governments would have come together to hide something like that.
Wouldn't surprise me it's actually soviet spy planes and the specs fudged to distract people away from potentially learning the soviets successfully made it to US airspace, and maybe a fear mongering campaign on top to keep people distracted from what's really going on.
If it's real, you'd think they'd have kept the tech to research it, and could show it off as proof. Not going to believe anything until we have pictures.