President Trump's missile defense project, called the "Golden Dome for America," aims to protect the U.S. from foreign threats. But it has a steep price and has been criticized by China as threatening to increase the risks of militarizing space and a global arms race.

The plan for a dome includes land- and space-based systems to detect and shield the country from missile attacks, which Trump estimated would cost $175 billion.

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