Weight Factor News Today

Weather, and with this many fatalities they will look at weight and balance. that is a critical thing for particularly small planes. you have to have -- you cant be overweight, you to have the correct balance or the plane is -- youre putting yourself in jeopardy. this is, you know a real tragedy. what happens in holidays is people tend to get anxious about getting to their destinations and they fly in more marginal weather and these accidents are usually completely -- they can be avoided. >> the...

This? >> reporter: gregg, this is fascinating thing to sigh. we just had a fly-by at dulles airport with the 747 mated to it. it is most unusual sight. the first thing you ask yourself when you see this how can this thing fly? it is a bit of a chore because it changes the center of gravity quite drastically on the 747 not to mention the weight factor and aerodynamic factor involved in that. if you look at the 747 pretty closely it has undergone a number of aerodynamic modifications. tail structu...