Happening Now: Volcanic Ash Shuts Down N. Europe Air Traffic

NY Times: The shutdown, among the most sweeping ever ordered in peacetime, forced the cancellation of thousands of flights and left airplanes stranded on the tarmac at some of the world's busiest airports as the rolling cloud - made of of minute particles of silicate that can severely damage airplane engines- spread over Britain and toward continental Europe. Read more from the New York Times.