CNN State of the Union May 17, 2015 13:16:00
Joining me now is national transportation safety board member robert some waul. you have given an assist at this point from the fbi, but the ntsb is really leading this up? >> yes, we have asked the tpheubfbi to come in and identify the expertise on the mark and we have gotten a lot done already and there is a lot more that needs to be done. >> how much credence do you give to the idea -- tell us if you have a sense of what the projectile might be a bullet or rock and how much creed kwrupbs do you give that that may have contributed or caused this accident? >> at this point, we want to chase t...
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