crash. i believe we were talking about how this u.k. traffic control company not saying power failure. they are calling it a technical glitch. is that it? well, we know that it s not a power failure and that would be highly unlikely to have a power failure anyway. there are four or five different sources of power for each of the control center. this particular piece of software is something that s been added to infrastructure that s been around for years and years and years. it schedules how many airplanes go into a particular area or which airplane goes to which controller within the control system. so what s important now is that these airplanes that are in the air landed. there are so many things impacted over the next few days and weeks possibly because everything is interdependent in the system including how many hours a particular airplane pilot can fly down to when the airplane can land.