Breaking news... on the investigation into the Kentucky plane crash that killed 49 people Sunday after a series of interviews.
The NTSB says the airplane crew actually got on the wrong plane before take-off. A ground crew member had to alert them.
The plane they were flying was actually next to them.
Meanwhile - for the first time.. we're getting an up-close look at Sunday's crash site.
All day - federal investigators have been trying to duplicate the conditions for the deadly plane crash.
They're using an aircraft similar to the CRJ-200 Com-air jet that crashed.