Delta Air Lines Flight 723 (1973)
Nowadays, we don’t have to worry as much about detrimental weather as we used to. But this wasn’t the case in the 70’s. This caused a DC-9 crash, which resulted in changes to weather-related flight procedures. During the flight, “the collision tears off some of the fuselage and the plane slams into the ground, breaking apart and bursting into flames.” Because of poor visibility, pilots had to rely on sensory instruments to land, which had a fatal result where many people died (History).