have you ever seen anything like this? this explosion of anger from the families in any of the investigations you were involved in? >> no. the family assistance act in the united states really set up a process to deal with these kinds of very challenging situations. but this is really unprecedented and is so heart rendering. >> miles, you have covered these investigations for years. have you ever seen this kind of anger and protest coming from family members? >> nothing like this. the family assistance act sets up a whole mechanism which provides counseling, grief support and frankly briefings in advance of news conferences so the families feel they are being informed and facts laid out for them, not conclusions, facts. that is the least the families are entitled to. >> there is a limited of time before they find the black box.