It could be something like the WU-14 that China's developing. https://en.wikipedia.org/wiki/WU-14 https://en.wikipedia.org/wiki/WU-14 https://thediplomat.com/

It could be something like the WU-14 that China's developing. https://en.wikipedia.org/wiki/WU-14 https://en.wikipedia.org/wiki/WU-14 https://thediplomat.com/2016/04/china-tests-new-weapon-capable-of-breaching-u-s-missile-defense-systems/ https://thediplomat.com/2016/04/china-tests-new-weapon-capab... In addition to the maneuverability aspect, my understanding is that such weapons also target an altitude that current US antimissile systems aren't designed to operate at. IIRC, there's a gap between the top altitude of one of the systems and the bottom altitude of the other.