During seven years of war, the U.S. military has shipped more than a million tons of equipment to Iraq, everything from tanks to toothpicks, and now the gigantic operation to pull it out again has begun.

For a start, more than 40,000 vehicles -- four, six and eight-wheelers -- have to be driven out of the country.

Moving all this hardware isn't cheap. The withdrawal is projected to cost more than $150 billion.
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