still to come on weather world. michael, you have some history there, haven't you? temperature tradition — more than 200 years of weather observing in ireland. i will go back to the beginning and see how it is still being done today. we have had a look at modern aviation here at belfast international airport. but now i am stepping back in time to learn a little bit more about the history and the relationship between aviation and the weather. i have a personal reason for being here, too. we will look at that later on. for now, let's head inside and meet our guide ernie cromie from the ulster aviation society. hi there, ernie. hi, sarah, it's a real pleasure to welcome you to the ulster aviation collection. thank you for having us. so ernie, before the introduction of modern day satellite and radar data, aircraft played a vital role in weather observing and forecasting. can you tell us more about that? yes, indeed, basically what it involved was the aircraft off the weather flights...