morning discovery. a guy in their ceiling. they don't know how long he was up there, but they called police and he was arrested for trespassing and property damage. and researchers discover a rare new species of shark by accident. it's called the carolina hammer head. it looks just like other hammer heads, but it's genetic makeup is completely different. the university of fish experts stumbled on the find while researching shark hubs in the base. 1963, the day begins with an excited welcome for president kennedy outside his ft. worth, texas, hotel. in nearby dallas, oswald is going to work with a hidden rifle. he kept it in ruth and michael payne's garage. >> the blanket looked like camping equipment. i think it never occurred to michael that there might be a gun. >> it is 8:45 central time. in less than four hours, president kennedy will be dead. >> that's a sneak preview of the special airing tonight, called