> in yemen, protesters threw shoes and large television screens showing a statement by president ali abdul. the president said he was prepared to step down if he would be allowed a dignified departure. his opponents accuse him of maneuvering to hold on to power. shoe throwing is a sign of contempt in arab culture. >>> continue clashing with riot police in london after more than a quarter million people marched in the city today. they are protesting the toughest cuts to public spending since world war ii. some small break away groups spray painted walls. protesters rushed inside before police arrived to block the doorway. today's demonstration may be the largest since the one at the start of the iraq war. >>> a computer crash at alaska airlines led to the cancellation of 15% of the company's flights nationwide. the central computer system went down around 3:00 this morning. in the bay area, five flights from sfo and one from oakland international airport were canceled. several other flights were delayed from 2 to 4 hours. it may be disappointing news, but one ticket, the $319 million jackpo