If I have a european iPhone can I charge it in an American USB port?

If I have a european iPhone can I charge it in an American USB port?

Yes its all the same

No! But you can charge it with at an electrical outlet, but you just need an adapter.
Get an adapter at Radio Shack

That's the whole point USB is universal you just need the 2pins for the wall socket is all.

I guess thats why they call it USB port. The U stands for Universal.