Invisible Killer (S05E01)

By the time the crew of Delta Airlines Flight 191 reached the threshold of Dallas Fort Worth Airport, they’d already diverted around 2 separate storms. They see rain and lightning up ahead, but fly on. Inside the storm, their plane is hit by powerful winds that slam the plane to the ground. 136 people die. The crash helps scientists overcome a notorious danger to airplanes, the microburst. (iTunes)