Your honest opinion, is Barack Obama American born?

Yes, until proven not and, there in lies the question. No one has seen a valid copy of barack 0bama's birth certificate. What's the big deal, or could it be that 0bama's birth certificate contains something that is detrimental to 0bama's political position? I can't help but wonder, could it be that 0bama was not born an American but instead adopted by his mother while she was in a foreign country? Other wise why not just show the birth certificate and put the issue to rest once and for all?