First segments.... (BEGIN VIDEOTAPE) DR. SANJAY GUPTA, CNN SENIOR MEDICAL CORRESPONDENT (voice-over): In a medical case as high profile as Terri Schiavo, you would think the medical experts would have all the answers. But just by listening to them and reviewing statements they gave to the court, it's easy to see why a final answer is so complicated. DR. WILLIAM HAMMESFAHR, NEUROLOGIST: I spent about 10 hours across about three months and the woman is very aware of her surroundings. She's very aware. She's alert. She's not in a coma. She's not in PVS. ... DR. RONALD CRANFORD, NEUROLOGIST: A...