journey. i'll give you a full briefing. >> first, mika, the news. >> let's get a look at today's top stories. we'll start with this situation that affects air travelers around the world. thousands of flights remain grounded throughout northern europe due to a massive cloud of ash from a volcano in iceland. it's the worst disruption in air travel since 9/11. tens of thousands of travelers on six continents are stranded. because the plume of ash is so powerful, it could shut down a plane's engine. the ash cloud is following the winds and weather patterns across the atlantic, which is of course the very same route planes fly. flight problems are expected to last at least another full day. normally there would be about 28,000 flights in european air space, but today officials are expecting just 11,000. however, ireland has reopened many of its airports because the ash cloud has moved away from most of that country's air space. now to politics. tea party groups use tax day