China said it is “gravely concerned” about President Donald Trump‘s ambitious Golden Dome project, and warned that it could upset the global strategic balance. On Tuesday, Trump announced the Golden Dome project — a concept initially pitched during his campaign that reflects Israel’s Iron Dome but is now more analogous to former President Ronald Reagan’s

Peskov said it was a sovereign matter for the United States.

Golden Dome is estimated to cost tens of billions of dollars and take years to implement, as the controversial program faces both political scrutiny and funding uncertainty.