NOTE: The United Kingdom of Great Britain and Northern Ireland (commonly known as the United Kingdom, the UK or Britain) consists of four countries: England, Northern Ireland, Scotland and Wales.

1. How has the eruption of the Eyjafjallajokull volcano in Iceland affected people traveling through Great Britain? Be specific.

2. Over what other countries might the volcanic ash travel?

3. When do forecasters predict the ash will subside to permit safe air travel in the region?

4. Planes fly through fog - why can't they fly through volcanic ash? Describe problems associated with flying through it. Be specific.

5. When was the last time Eyjafjallajokull erupted?