Certainly. The north warning system has no capacity to be able to detect a hypersonic missile flying over the Arctic region heading towards targets in the south. The American ballistic missile early warning system is optimized to deal with long-range ballistic missiles, not hypersonics, so you have a major gap there.
Moreover, the north warning system has a difficult time. It can potentially briefly detect cruise missiles in flight, but because of the long range, they'll be launched well over the Arctic Ocean, and that is another important detection gap we have. If we can't detect, we can't deter and we can't defend.