are prepared for it, that they are on approach, that they're on path to get to the airport, and that they're working together effectively in this very high risk environment. >> one thing that we have heard, you've determined that the plane, we've heard this over and over again, was flying too low and too slow. you said the plane was at significantly lower, below the 137 knots that had been agreed upon for this landing. what is significantly lower? we're speaking in layman's terms obviously, but it's clearly critical to finding out why this happened. >> it is. it's important to understand why this happened. we know they were below 137 knots, and like i said yesterday in my press conference, we're not talking about a few knots here or there. we're actually talking about significantly below 137, but what we need to do now is really refine that raw data on the flight data recorder and corroborate it with the radar track data from air traffic