about the question of the root of this plane. i want to show this new york times map that shows actually the malaysian plane, the active route it was flying. it s an active route used by commercial airliners every day. hours before the crash, russia actually closed four airways near the ukrainian border, including one that would have been of continuation of the route that this plane was flying on. so tony, explain to us what that means in layperson s terms. these navigation routes are global positioning routes. they are high-altitude routes. simply what they are are highways in the sky. if you think of a road network, it s the same thing for airline pilots and general aviation pilots. so what you re not seeing in that new york times map are thetersecting airways, the highways that intersect up in the sky. at any point along those intersections the air traffic