Unlike the Miracle on the Hudson, all passengers aboard Colgan Air Flight 3407 were killed when the plane nose-dived into a neighborhood near the airport in Buffalo, New York. What should we glean from the lack of any distress call? How much ice is needed to really imperil an airplane? And what will investigators be doing with this evidence to determine an official cause of the disaster? We ask David Field, the Americas editor for Airline Business magazine.
