"The Aegis, THAAD, Patriot, and Iron Dome systems are fundamentally flawed in their concept, so they can't even defend against a standard ballistic missile, let alone something as sophisticated as this Oreshnik system." - former scientific adviser to the Chief of Naval Operations

Americans, and by extension Europeans, have no idea what the Ruskies are up to.

"No, no, absolutely not. There's nothing available that can engage that system and offer any meaningful defense against it. (…) I have to say that my reaction is that anybody who would claim that Oreshnik represents previous outdated developments of Moscow either has no idea what they're talking about, or they're just lying. My guess is these statements are all being made by political people who don't know one rocket from another. This is a very advanced system, which uses very advanced technology. It's like comparing one of the first automobiles that people made that were steam driven to a modern, advanced car, and saying, 'Well, they're both the same; they're both cars.' Well, that's in some sense true, but from the point of view of a technologist (…) it's a totally ridiculous comparison." - Theodore Postol, former worker at Argonne National Laboratory