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hit. the president of yemen's refused to sign a deal with opposition leaders to step down. the agreement had been brokered by make states. the ministers failed to convince fail the president. barack obama arrives in ireland today at the start of his visit to europe. as part of his trip he's going to visit the home of his great great great grandfather. i'm zain vergee in london. "world business today" starts now. good afternoon from cnn hong kong, i'm andrew stevens. and a very good morning to you from cnn london, i'm nina dos santos and this is "world business today." from sink...

I think he does. but he doesn't appear to have one. and this is a very bad start. . >> and lawrence, i think to your point -- >> go ahead. >> to your point about the sarah palin comparison, there's so many times he's asked a direct question he doesn't even come close to answering it. he's, you know, he's not addr s addressing the substance of the question at all. i think that's when he gets into his word salad territory where you go where is he going with this? i think it's an intentional attempt to be vague and not put forward anything of substance. and that way i think there is an appropriat...