MSNBC: How can investigators find the cause of the plane crash in Philadelphia? Fmr. investigator explains
Efforts to determine what went wrong Friday night in a tragic plane crash in a Philadelphia neighborhood are only just beginning as officials start to examine plane parts and footage of the accident. Former NTSB Investigator Greg Feith explains what goes into an operation like this and why it’s so crucial to collect all evidence before making a determination on a cause.
