valid I-20 but expired F-1 visa

flaca321

Registered Users (C)
My student visa expired in December 2005 but I enrolled in another class so I got a new I-20 which expires in 2012. I've been told that I can go to Mexico, Canada and some other places in the Caribbean for no longer than 30 days and reenter the US even though my visa is expired. If I'm not wrong I need to keep my I-94 when I leave to be able to re enter.

My questions are...

1- What else do I need to show when I leave/reenter the US?

2- What happens if from Mexico I go somewhere else and then return to Mexico to reenter the US?

Thanks
 
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