The United States has acknowledged major gaps in its homeland missile defence system, warning that existing capabilities are not equipped to counter advanced threats such as hypersonic and long-range cruise missiles.This comes as Washington moves forward with plans for an ambitious multi-layered "Golden Dome" defence shield, aimed at strengthening protection against evolving threats from countries like China, Russia, Iran and North Korea.Senior US defence and military officials, testifying before lawmakers on fiscal year 2027 budget requests, said current systems were designed for a very different threat environment, ANI reported."We have a very limited, ground-based single-layer homeland defence system that was…