The Bush administration will just charge you for it.
The Department of State reminds American citizens that the U.S. government does not provide no-cost transportation but does have the authority to provide repatriation loans to those in financial need. For the portion of your trip directly handled by the U.S. Government we will ask you to sign a promissory note and we will bill you at a later date. In a subsequent message, when we have specific details about the transporation arrangments, we will inform you about the costs you will incur.
TONS of money for Iraq. NOTHING to get Americans out of a war zone.