Volcano eruption in Iceland

The vulcano Eyjafjallajökull eruption in Iceland caused a lot of trouble in the airspace of Europe. The ashes that the volcano was releasing would get into the plane's engine and would make it fall, thats why many flights have been canceled causing a lot of frustration to the passengers that had already bot their tickets. But thats not the only problem there,is almost impossible to predict the erupition of vulcanos and there are at least, another 8 vulcanos close to urban centers that are activated and can cause more trouble to the world air space so, it's better that you are not thinking of traveling by plane or balloon.