What is happening to the value of the U.S. dollar thesedays? What causes the val

What is happening to the value of the U.S. dollar thesedays? What causes the value of the U.S. dollar to rise or fall? Whodemands U.S. dollar? Who supplies U.S. dollar? When we purchaseGerman products does our demand for euro go up or down? What arefreely floating exchange rates all about and how do they work? Howcan the falling U.S. dollar impact your travel expenses? Why woulda cheap dollar relative to other nations currencies be good or badfor U.S. trade?