Downing down NK missiles: The need of a new approach

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.

Congressional documents are actually talking about “additional investments” in “boost-phase missile defense.” The goal is to hit long-range missiles at their point of greatest vulnerability: while their engines are firing and the vehicles are stressed to the breaking point, and before their warheads are deployed.

In interviews, defense officials, along with top scientists and senior members of Congress, describe the effort as a response to the unexpected progress that North Korea has made in developing ICBMs capable of delivering a nuclear bomb to the continental United States: “It is an all-out effort,” said Senator Jack Reed of Rhode Island, the top Democrat on the Senate Armed Services Committee, who returned from a lengthy visit to South Korea last month, convinced that the United States needed to do far more to counter North Korea. “There is a fast-emerging threat, a diminishing window, and a recognition that we can’t be reliant on one solution.”

One first approach is to have stealth fighters such as the F-22 or the F-35 scramble from nearby bases in South Korea and Japan at the first sign of North Korean launch preparations. The jets would carry conventional air-to-air missiles, which are 12 feet long, and fire them at the North Korean long-range missiles after they are launched. But they would have to fly relatively close to North Korea to do that, increasing the chances of being shot down.

A second 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. Using cyber weapons to disrupt launches is a radical innovation in missile defense in the past three decades, but in the case of North Korea it is also the most difficult: It requires getting into the missile manufacturing, launch control and guidance systems of a country that makes very limited use of the internet and has few connections to the outside world — most of them through China, and to a lesser degree Russia.

And a third approach is to develop a UAV that would fire potent laser beams at rising missiles. But recent plans would have it make its debut no sooner than 2025 — too late to play a role in the current crisis or the Trump presidency.