ryanair holdings is one airline, they have said, look, you can fly through it.nt on a little test flight. they said, we managed to do it. it's okay. the question is really going to be about the ash now. you have to figure out and see how thick is the actual ash going to be? is it low, medium, high? in scotland, it is really high and you can't fly through that stuff. imagine flying through sandpapers or shards of glass. you are going to get something stuck in the engine if you do that if it is really thick. the plane could stall and come crashing down. that's the big worry with the ash that also has debris in it after it has erupted. >> that would certainly ruin your vacation. >> yes. >> yes. zain verjee, thank you. we will keep an eye on that volcano in iceland. we will go back to london in a few minutes. >>> president obama's busy day includes a meeting with britain's prime minister. we will take you to 110 downing street. our t.j. holmes will walk through a destroyed home. [ female announcer ] splenda® no calorie sweetener is sweet... and more. if you replace