>> but let's start with president obama who had to cancel his plans today to attend the polish president's funeral as volcanic ash shuts down air travel over a large chunk of europe. the white house confirming air force one can't make the trip. the polish president and his wife died with 94 other people in a plane crash last weekend. president obama issuing this statement, saying, quote, i regret that i will not be able to make it to poland due to the ash that is disrupting air travel over europe. michelle and i continue to have the polish people in our thoughts and prayers and will support them any way i can as they recover from this tragedy. the rising ash forcing airlines to ground three quarters of european flights this weekend. we're talking thousands of flights affecting millions of passengers. it's the biggest aviation shut down since world war two. well, as for when conditions will improve, there is no end in