people but they're not going to make changes but they don't know. so they're going to wait, not order changes, and just bet that it doesn't happen again. and that's a very foolish approach to safety. safety should be we know what's happened and we can make the change, not we're not going to make changes because we don't know. >> american airlines, mary, has more than 300 737s. only 24 are max 8s. southwest airlines has more than 350 737s. only 34 are max 8s. would it be easy to temporarily ground such a small amount of planes? >> well, i don't say it would be easy, but with fleets like that and the ability to change their fleets and make up for the shortages of the planes yes, for carriers like that they could do it. and they have experience in the past with other instances where they've had to ground -- southwest had maintenance issues where they've had to pull planes under orders. >> so why the resistance, then?