"This highly offensive system violates the principle of peaceful use of outer space," said Mao Ning, a spokeswoman for the Chinese Foreign Ministry, at a press briefing on Wednesday morning.

Canada is looking at potential investments in U.S. President Donald Trump's proposed Golden Dome missile defense shield, Prime Minister Mark Carney told reporters on Wednesday.

NBC News' Zinhle Essamuah explores whether an Iron Dome is feasible in the U.S.