Seven years ago the eruption at Eyjafjallajokull volcano grabbed the attention of the world. In recent times few eruptions have caught a similar attention. It was almost the only thing the news media discussed for days. One of the main reasons was, of course, the concern that the volcanic ash the eruption spewed into the atmosphere would damage aircraft engines. Consequently, most of the airspace in Europe was closed down for days and all aircraft grounded with consequence for hundreds of thousands of people.