Missile Warning & Defense

All the best satellite intelligence and ground-based radars in the world can still miss threats if they don’t know what they’re looking for.
The appearance of a Chinese surveillance balloon over North America in recent days should cause Americans to ponder just how safe they are from aerial attack. Can we defend our airspace from modern drones (unmanned air vehicles), hypersonic missiles, ballistic missiles, and—yes—from airships? Congress should ...