Trump missile defence review calls North Korea 'extraordinary threat'

U.S. President Donald Trump speaks during the Missile Defense Review announcement at the Pentagon in Arlington, Virginia, U.S., January 17, 2019. REUTERS/Kevin Lamarque

WASHINGTON (Reuters) - President Donald Trump unveiled a revamped U.S. missile defence strategy on Thursday that called North Korea an ongoing and "extraordinary threat," seven months after he declared the threat posed by Pyongyang had been eliminated. 

The plan, which also detailed concerns about the burgeoning capabilities of Iran, Russia and China, called for developing space-based sensors to detect incoming enemy missiles and exploring space-based weapons to shoot down missiles among other steps to shield the United States.