The dollar is not just the currency used in the U.S., it is very much the world's currency. It's been that way for 80 years – but that could change. Luis Robayo/AFP via Getty Images hide caption
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When it comes to fighting inflation, Federal Reserve Chair Jerome Powell has said, "We will keep at it until we are confident the job is done." Samuel Corum/Getty Images hide caption
Financial markets are a mess around the world. Fingers are pointing at the Fed
People line up to visit St. Peter's Basilica at the Vatican. Although flights to Europe remain expensive, the falling euro is still leading to a surge in American tourists visiting Europe. Andrew Medichini/AP hide caption
A new BMW X4 vehicle is unveiled during a March 2014 news conference at the BMW manufacturing plant in Greer, S.C. Chuck Burton/AP hide caption
A pedestrian passes a currency exchange in London Jan. 5. The value of the U.S. dollar has risen about 15 percent against the euro since last summer. Andy Rain/EPA/Landov hide caption
If the dollar gets too expensive, U.S. exports like heavy equipment made by Caterpillar can get priced out of the market. Seth Perlman/AP hide caption