I am planning to go to nepal in dec and be back in Jan. The ticket I got has entry to the US on Charlotte NC. All my documents are in order and I am a F1 student. My visa is valid till jun 2012. I have heard that immigration officials might be tough depending upon which airport I enter the US. So I was wondering if it could be a problem for me. Any experience in any airport while coming back with F1 would be greatly appreciated. Thank you