I am a medical student currently studying outside USA and my one year extension of I-751 expires soon (in July 2009). I visit usa over every break and my next visit will be in April. I dont think I will be able to come back in the middle of my semester unless I really have to. What should I do in order for me to extend my I-751 more so I dont get locked out of US ..?? can I go to embassy and ask them for a letter or something??