work. >> these are all basically cranial -- >> i understand what the mcdonalds are talking about when i meet pedestrianic neurosurgeon james goodrich at children's hospital in mont fear. there are heads everywhere, but his mind is singularly focused on separating jadon and anias. >> the goal ideally is to have both children come out without neurological issues, but one has to be realistic. i mean you cannot separate two brains, particularly if there is fusion, without the potential risk of something happening. >> a risk others have taken with goodrich. he has separated more twins joined at the head than any other surgeon in the world. >> they have since undergone -- >> ironically, he stumbled upon this specialty years ago when a charity for families in need asked him to help separate a set of conjoined twins. >> i had really done my homework and looked at the literature on craniopagus twins at that time,