The US put its Ground-based Midcourse Defence (GMD) missile shield to the test in May, firing an intercontinental ballistic missile from the Marshall Islands and knocking it out of the sky with a missile fired from California.
The long-planned test vindicated the expensive, complicated effort to defend the US homeland from missile attacks — but there’s still no stopping a real attack from a determined foe like North Korea.
On Tuesday, North Korea successfully tested a missile that experts say could reach Alaska.
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