ABC’s Senior Transportation Correspondent David Kerley on the Southwest Airlines engine explosion

In this Tuesday, April 17, 2018 frame from video, a National Transportation Safety Board investigator examines damage to the engine of the Southwest Airlines plane that made an emergency landing at Philadelphia International Airport in Philadelphia. A preliminary examination of the blown jet engine of the Southwest Airlines plane that set off a terrifying chain of events and left a businesswoman hanging half outside a shattered window showed evidence of "metal fatigue," according to the National Transportation Safety Board. (NTSB via AP)

ABC’s Senior Transportation Correspondent David Kerley joins the Steve Cochran Show to discuss the Southwest Airlines engine explosion. ┬áDavid says there are still a lot of unanswered questions on if the engine caused the window to pop out or if debris hit the window and caused it to pop out.