DAMN sad news 9 people on board. None survived. The Learjet 60 was flying from Austin to the Bahamas when it went into a high speed nosedive near West Palm Beach. Here's what investigators will look at first. The weather. Rain, lightning and gusty winds were reported in the area. Flying into storm cells can throw a jet out of control in seconds. Spatial disorientation. Inside thick cloud, pilots can lose all sense of up and down. The plane can roll into a dive while it still FEELS level. It's one of the most common causes of steep, fast crashes like this. A mechanical failure. A runaway trim or a flight control problem can force the nose down faster than a crew can fight it. The steep angle in the video tells you something went wrong FAST. It doesn't tell you why. Only the NTSB investigation will. Thoughts with the families.