Import
  
To bring product into a nation.
Think: we suck down a gadjillion gallons of dead dinosaur gunk to run our cars. We don't have enough DDG in the U.S. to keep everyone happy and pollute-y. So we import oil from the Middle East to sate our thirst.
Countries that import generally pay for those imports with cash. So think about it. The importing country gains cash from doing other stuff...working hard, creating GDP, profiting from whatevers. That cash then goes to the selling country. So you can imagine that there are a ton of U.S. Dollars floating around the Middle East, courtesy of our unslaked thirst for oil.
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