Time to spring forward: Why do we change our clocks?

VIDEO: Inside a tornado

Take a look at this: a glimpse inside a tornado. Storm chasers shot this in Kansas on Monday.

They were inside a specialized tank-like machine called a Tornado Intercept Vehicle, or TIV. They say wind speeds were up to 170 miles per hour … strong enough to blow open a hatch and a door, and rip instruments off the roof, but it stayed on the ground.