There still is NO OTHER DEFENSE.
Well then, we'd best get crackin'. Wait. We've spent all our cash building Iraq and Afghanistan for people who don't even think like us.
The ABM sites in Alaska can't handle but a few missiles from such as North Korea. So again, that's a THREAT to other nations.
A threat to other nations how? Sounds to me like an opportunity for them to attack.
There. I rearranged for better clarity! The thousands of offensive missiles are a threat. Mutually Assured Destruction is a threat.
And some argue that a completely effective missile defense shield is also in effect a threat because it makes the enemy vulnerable to a first strike without being able to retaliate. It shifts the balance of MAD.