"Strategically???? But the US cannot invade any other country, now!
And after what happened, the US congress will never accept a new invasion!
It was a strategic disaster, to say the least!!"

What other countries would we need to invade?

"The US just doesn't understand and know how to deal with terrorism."

Does your ideas of dealing with Terrorism REQUIRE the miltary power of a superpower? IF not then, other countries [like say Belgium] can solve this problem.
If you think that solving terrorism requires the miltary power of a superpower, what are your ideas of how to use this miltary power?