i have been living here in the US for the past five years. Never had a problem. This year i had this one border guard who didn't like the topic of my dissertation and said that it was a stupid idea and why where they going to give me a phd for studying emergency response. He asked me about 20 question about my school work and thought i was making all this stuff up, and then he finally let me go. Oh i don't think that he liked my red sox cap either, he said they were a lousy team.