They do reschedule if you have finger cuts. How about you live like you normally do? Because if you stress this idea, you will definitely cut your fingers.
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Application Filed - 8/16 Chicago Lockbox [Nebraska Service Center]
Date of I-797 C Notice of Action - 8/27
Date of Biometrics Appointment - 9/24
Date of Approval of Applications - 12/14
Date of EAD - 12/20