This is the scene tonight. Major plane disaster in Kentucky. A UPS plane crashing near an airport in Louisville.When tragic aviation accidents happen soon after the search for survivors comes the search for the so-called black box. Every commercial plane has them. Companies like GE and Honeywell design them to be nearly indestructible, to help investigators understand the cause of a crash.They're very crucial because it's one of the few sources of information that tells us what happened leading up to the ac ...