Some guy already went to Mexico and came back. As of Puerto Rico and Hawaii its also already been done by some dreamers.
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Date Application Sent - 9/12/2012
Date Delivered - 9/13/2012
Date of I-797 C Notice of Action - 9/18/2012
Date Biometrics scheduled - 10/17/12(Taken)
Date of EAD approval - 11/20/12