st. john's that day, but miraculously, most survived. >> this is the new tower. this is the original hospital. >> reporter: two days later, for jim risko, it's all sinking in. >> my heart's broken because my mom and dad died here. my son was born here. i have so many memories of working with the other doctors and the nurses and this is home. i mean, st. john's is more than a building. it's a spirit. we are asking what so many people in the midwest are asking. why? why are there so many powerful and deadly tornado this is year and how can you tell the strength of a tornado by looking at the damage? we'll have the science behind these killer tornadoes next. my diet? well yesterday i had an apple turnover.