Aiming a nuke takes 40 minutes we have enough time yet.
Anyway why would a Middle East country will send a nuke through Poland? It's not the shortest way.
China may send one within Range.
Iran feasibly also.
The main tarket of this though is Russia.
It wouldn't be through Poland. You couldn't launch a interceptor from the U.S. because of the distance. So Poland may not be the best location, but it is preferred to locating them in Western Europe. In any event this is a problem for the U.S., Europe, including Russia. All have ongoing problems with Islamic terror, and all are potential targets. In any event interceptors are not nuclear mussels in the first place, so all the talk about aiming this, that or the other is irrelevant to the article at hand.
Actually, a missile launched from Iran towards the U.S. east coast would travel very close to, and in some cases through Poland. Launched from Tehran to New York City, a missle would pass over northeastern Poland.