China has deployed a working prototype of a global defence system similar to the United States’ proposed Golden Dome , while hailing a breakthrough in data processing technology for worldwide threat management, according to scientists involved in the project. It is the first missile defence system known to reach planet-wide coverage. The US’ missile defence system is divided into separate regional segments. In May, President Donald Trump proposed the Golden Dome initiative to break down geographical barriers and achieve global information sharing. Neither the Pentagon nor defence contractors have proposed a feasible solution for managing data flows, or reached consensus on how the system will be implemented.