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The National Transportation Safety Board just gave us an update on what caused a commuter jet to crash into a home in Buffalo, NY last month. Investigators checked out the system. That seems to have been working before the crash. Another possible cause of the crash--ice on the wings. Now investigators say there probably was ice on the wings, but the plane was responding to it properly.

They're going back to the drawing board now to take a closer look and figure out what cause the fierycrash that killed 50 people.