The New York Times:
WASHINGTON – Concerned that the missile defense system designed to protect American cities is insufficient by itself to deter a North Korean attack, the Trump administration is expanding its strategy to also try to stop Pyongyang’s missiles before they get far from Korean airspace.
The new approach, hinted at in an emergency request to Congress last week for $4 billion to deal with North Korea, envisions the stepped-up use of cyber-weapons to interfere with the North’s control systems before missiles are launched, as well as drones and fighter jets to shoot them down moments after liftoff. The missile defense network on the West coast would be expanded for use if everything else fails.
In interviews, defense officials, along with top scientists and senior members of Congress, described the accelerated effort as a response to the unexpected progress that North Korea has made in developing intercontinental ballistic missiles capable of delivering a nuclear bomb to the continental United States.