Domestic flights with a valid passport are safe.

A correctly and timely filed I-751 with a valid passport would be OK for a short trip abroad.

No. TSA and most airlines require a photo ID. Look for some other id, employment, school, farness club, among others.

It appears this issue is handled differently across USCIS field offices. Most jurisdictions would accept a certified letter from law enforcement...

Yes, your lawyer should take charge and convince USCIS of what happened.

The Mandamus is an effective tool to move cases that have been pending for an unreasonable amount of time. I don't think 30 months is unreasonable....

You are a non-resident for tax purposes..

It appears possible with counsel of a skilled immigration lawyer.

It's not common to go from doctoral to master's degree program. Usually, it's the other way around. But is occurs without any negative impact on...

In general, Canadians as everyone else is subject to the same DUI scrutiny for inadmissibility. I'm unaware of any Canadian exception. Therefore,...