audience, the g8 leaders. the search for the missing becomes more desperate by the day in the u.s. towns slammed by a massive tornado. and meet the opposition, but who s arming the anti-gadhafi fighters in libya? we ll bring you a live report from tripoli. we want to begin in yemen now where the violence there is dramatically escalating, as the president is dismissing all appeals for him to step down. explosions have ripped through the small, sanaa since late last night. take a look at this video. eyewitnesses said clashes are start to spread. violence has taken a turn for the worst since sunday when mr. saleh again walked out of a deal to give up power and washington is really worried. they said there is a threat for civil unrest and terrorism. they are ordering all nonessential diplomats and their families out of the country. president barack obama said yemens leader should honor an earlier promise to leave office. president saleh has tens of thousand frz suppos of supp