that are dispersed over a wide area. the concern is that some of those bomblets fail to explode, posing a danger to civilians long after a conflict has ended. and for that reason, they re banned in 120 countries. human rights watch says both russian and ukrainian forces have used cluster munitions already killing civilians and military personnel. so we know the risks of these cluster bombs but how do they work? the munition is fired, before the ammunition or bomblets from the cluster are released. the bomblets then fall to the ground, detonating on impact. in this us military training video you can see the sprawling nature of the weapon, which combined with its failure rate has raised humanitarian concerns for nearby civilians. as we said, the usage of cluster bombs is controversial, particularly due to their high dud rate or rate in which they fail to detonate. however us national security advisorjake sullivan said the cluster munitions america will send to ukraine
each cluster munition carries large numbers of smaller bomblets, that are dispersed over a wide area. the concern is that some of those bomblets fail to explode, posing a danger to civilians long after a conflict has ended. and for that reason, they re banned in 120 countries. human rights watch says, both russian and ukrainian forces have used cluster munitions already, killing civilians and military personnel. as we said, the usage of cluster bombs is controversial, particularly due to their high dud rate, or rate in which they fail to detonate. however us national security advisorjake sullivan said the cluster munitions america will send to ukraine have a dud rate of less than 2.5%. us officials say that russia s cluster munition dud rate, meahwhile, is between 30 to a0%. earlier today sullivan defended the decision to send ukraine cluster bombs. we recognise the cluster munitions create a risk for civilian life and this is why we deferred the decision for as long as we co
and his republican primary challengers, but because of the bitterly cold weather. in the past week, iowa has been rocked by blizzards, with life threatening temperatures. live now to des moines in iowa and our presenter, caitriona perry. let s talk about the league to begin with, donald trump, he is a clear leader at this point? he is, he has been heading every poll taken our you are a nationally since the cycle began. the latest poll came from the respected newspaper in conjunction with nbc news and they came out on saturday night. it had donald trump at 48%. behind him, nikki haley on 20%, so more than twice the number of people who say they will vote for nikki haley say they are valuable donald trump. it is very accurate. interestingly, as an outlier poll, howevertends interestingly, as an outlier poll, however tends to win and when iui does not go on to win the presidency, but donald trump this time around is letting to break a pile of records here. he was to win the poll
conflict. all of that of course on the line tonight and of course this saturday morning where will is right now.w. thanank you all l for being g w and thanksks to will. it s time now for ac 360. tonight, which candidate benefits when the roads to the white house freezes over. we re live in iowa where blizzard conditions and subzero temperatures threaten to be a decisive factor in monday s caucuses. also a night after the u.s. and british air strikes on houthi targets in yemen a new message from a top houthi leader. and later cnn s donee o sullivan investigating how skeptical officials can face backlash from conspiracy theorists. thank you for joining us. we begin with iowa three days from the caucuses and the state is being hammered by winter weather. this is video of the capital des moines where the temperature is now 9 degrees. the wind chill is minus 13, and a blizzard warning is in effect. cnn s jeff zeleny is there for us tonight. jeff, i don t know how we conv
tonight which candidate benefits when the road to the white house freezes over we are live in iowa. also, tonight after u.s. and british airstrikes on targets in yemen, fighters try to make good on their threat of revenge. later, investigating how even skeptical officials can face backlash. we begin with iowa. the state is being hammered by winter weather. this is video of the capital, des moines, where the windchill is -13. a blizzard warning is in effect. jeff, how did we convince you to stand outside? how is it feeling there and how is the campaign being affected tonight? it is chilly, there is no doubt about it. the wind is the biggest issue. this is as warm as it is going to be between now and the caucuses. over the weekend it will increasingly become colder and colder. the snow is not a big concern, iowans are used to snow. it is the dangerously cold temperatures that are making the campaigns make backup plans for how to get supporters to the caucuses. excuse me, it i