problem or maybe even a door problem. >> so how much fuel do they have to burn off? does it have to be nearly empty before the plane lands? >> ideally, yes. because they want to get it as light as possible because if it touches down and it's heavy, you know, they don't have as many options to have a very light landing, to hold that nose gear up as long as possible. and then also you have much more fuel at a site for example, if the tank would come open if you'd have a tear in the tank and sparking you would have a much worse situation than if you have empty fuel tanks. so if they had only gotten four hours into the flight you have to carry enough fuel to your destination, which is across the atlantic plus enough fuel to your alternative safety reserve airport, plus another 30 minutes beyond that. so they had a fair amount of fuel on board that plane and they obviously have to burn a lot off. >> i think, mary, that is the plane so i'm assuming the plane