What did Iceland's ash do to Eurpe?

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Yahoo!News
April 15, 2010

http://news.yahoo.com/s/ap/20100415/ap_on_bi_ge_eu_iceland_volcano

Iceland's Volcanic Ash halts flights across Europe
by Robert Barr and Jill Landers

An ash cloud from Iceland's volcano halted any flights in and out of Europe. tens of thousands of people are stranded. It is not sure when they can fly again.
We are feeling sad and troubled for the stranded passengers and for the European , who are effectively isolated from an air travel for awhile...
Please think about these people and send them your good thoughts and prayers...
we hope that they will be ok... They are our friends...