Europe’s airports are busy with heavy consequences for the flights’ punctuality, about the 20% of the planes have a delay of 15 minutes. Among the several hubs of the old continent the worst is the Londonian air station of Heathrow, where more than a quarter of the planes takes off with a delay of 33 minutes. "Bad weather is an important factor, expecially during Winter", Ulrich Schulte-Strathaus, gen...