CNN Anderson Cooper 360 June 4, 2013 02:04:00
Three of their own, tim's brother takes comfort knowing his brother died doing what he loved. >> i just could never think it would ever happen to him because of his level of expertise, years of being able -- of doing this. if i had to have a way for my brother to die, it would be doing what he did. >> unlike the rest who died in the storm, those three storm chasers made the choice to get as close as possible. the question is why chase storms at all, beyond providing dramatic video, what purpose does it serve and what really motivates the people who do it. joining us tonight is josh warman, sto...