US President Donald Trump’s ambitious plan to build a national missile defence system, dubbed the “Golden Dome”, may not be able to fully protect America but could accelerate the global arms race involving China, Russia and North Korea, according to experts. “If we expand these missile defences further, we can expect additional responses,” said Steve Fetter, a professor at the University of Maryland. Speaking during a discussion at the Brookings Institution on Wednesday, Fetter noted that the...