Daring video takes you inside a massive tornado
Ivy and Casey said wind speeds were clocked between 150 and 175 mph before their instruments were torn off the top of their vehicle by the violent wedge tornado northeast of Smith Center, Kansas. Casey has since posted a video of the damage the TIV took in the storm's aftermath.
How did they manage this video and survive to tell about it? The TIV, which Casey created, was specifically designed to withstand a tornado's wrath. It's essentially a Dodge truck that has turned into an armored tank that can dig itself into the ground and transform into essentially an upside-down bowl so the tornado's winds can push over and around it without taking it away.
Casey is an IMAX film-maker and long-time storm-chasing veteran. You can see more of their successful chases on their website.
CNN interview with Sean Casey: