Why would anyone in their right mind risk leaving the United States when they have no legal presence in the first place? Advance parole does not guarantee re-entry. Just wait a little longer. If you follow the news immigration reform is a big topic for next year. Wait till then to leave the country unless you want to be denied at the airport and sent back.
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Sent: 10/3/2012 California routed.
Biometrics: 10/16/2012
Approved: 11/10/2012
SSN: 11/20/2012