NOVA’ video, Deadliest Tornadoes is a fitting program to watch as the region commemorates the anniversary of the terrible tornadoes that hit last year. The DVD looks at the scientists striving to understand the forces at work behind the outbreaks of violent tornadoes during 2011. Could their work improve tornado prediction in the future? Order this video (Deadliest Tornadoes, I.D. 2271) by clicking here.