up in the air. travelers' plans hang in the balance as a volcanic ash cloud closes in on britain. it's 5 a.m. in washington, 11 a.m. in tripoli. i'm, i'm zain vergejee. president obama arrives in britain early and gets ready to meet the queen.

rain of fire. more than a dozen bombs fall on tripoli as nato launches a massive air strike on moammar gadhafi's compound. look at this trail of destruction. the search for survivors after a deadly tornado flattens a town in the u.s. midwest. it's an unpredictable situation. changing by the hour. british authorities are saying, watch this space as a voluntarily cannish ice cloud from iceland creeps further south toward the uk and main land europe. uk's official weather service told cnn the plume of ash will spread into all of british air space within the next 24 hours. thousands of people are waiting to see if their travel plans are going to be disrupted. dozens of flights to and from airports in scotland are canceled. one airline is challenging advice not to fly.

irish carrier ryan air says restrictions are totally unnecessary. most airlines will review the situation around 1 p.m. gmt. let's go to emily ruben. what's the latest information you're getting? >> well, as you've just said, the ash is spreading. the focus has been on scotland, northern ireland and northern england but it won't be long before the whole of the uk is covered. euro control, who monitor european air space, say 252 flights have been canceled so far. what's different this time to last time is that they graded the different densities of ash. the areas now most at risk are scotland, northern ireland and parts of northern england. let's take a look at how the cloud has spread. this is may 22nd, date of the volcano erupting over iceland. by the following day, it spread pretty much over green land down over the uk and across parts of russia. the latest diagram shows from the may shows the ash cloud has

reached canada, norway, sweden, norway, sweden, denmark and netherlands as well. >> there's been a lot of disagreement from the airlines about this, right? >> well, zain, you're right. ryan air's chief executive michael o'leary has come out strongly saying ryan air strongly objects to this decision, the decision to ground aircraft and believes there's no basis for these flight cancellations. he went on to say we'll meet with irish aviation authority on tuesday morning to have this restriction on rain air flights removed as a matter of urgency. >> did they overreact last time? >> well, a study by university of copenhagen said safety concerns were actually very well founded. that was because of the abbrasive nature of the dust. it meant planes had to be grounded otherwise their engines would have been irrepublicably damaged. since then the caa met up with engine manufacturers and they revised the level at which it's safe to fly. say, for instance, 2010 last year when the skies above europe

became very quiet, the level which thought was safe to fly was 20 0 micrograms per cubic meter. fast forward to today and they've upgraded that. now they say 4,000 micrograms per cubic meerlt and means it's safe to fly at that level. the caa says this disruption -- as you're saying, this is a situation change hour by hour. >> thanks so much. now, in case you're wondering why iceland, well, it's because iceland sits on a volcanic hot spot. it's home to about 35 active volcanos meaning they've erupted over the last several centuries. iceland sees a major volcanic event every five years on average. the most recent was last year when millions of passengers. were strand. this time the ash particles are heavier meaning they'll fall to the ground faster.

grimsvotn is the most active volcano. one man who had to change his plans is president obama, he flew into britain a day earlier from ireland to make sure the ash cloud couldn't throw off his visit and schedule. the president's on a three-day state visit to britain. today he's meeting queen elizabeth. on wednesday he'll address parliament and hold talks with prime minister david cameron and the leader of the opposition ed milliband. mr. obama is the third u.s. president in 100 years to make a full state visit to the uk. he and his wife, michelle, will be staying tonight and tomorrow night at buckingham palace. so, what's on the agenda today? >> basically, this is the more ceremonial part of the visit. he'll be arriving at buckingham palace later today, greeted by the queen, they'll have their official welcoming ceremony there before he then moves on to another ceremony at westminster,

briefly meets with prime minister cameron and the opposition leader, but only briefly. most of the politics will be left till tomorrow. today is really reserved for the queen and those sort of ceremonial activities. president obama and the first lady will also be having a state dinner with the queen later this evening. of course, spending the night at buckingham palace. >> where are they going to stay? >> visiting heads of state always stay at a suite of room called the belgian suite and it's called that because it was originally it was designed for prince albert known as the king of the belgians. this is where it gets its name. it's where all visiting heads of state stay while there. it's a very nice room, indeed. >> i'm sure it is. what about the personal relationship between the obamas and the queen and the royal family? >> they have a very good relationship. remember, president obama visited here before. >> right. >> there was quite a bit of cafuffle last time, especially because michelle obama got quite

casual with the queen and she gave her a big hug and there was discussion about whether that was appropriate. clearly it was because they have a good, warm relationship and president obama said he really looks forward to coming and his children have very good memories of being here. >> didn't the queen put her arm around michelle as well it? >> can exactly. >> did that make it okay? >> it's a mutual feeling. >> thanks. we'll watch to see if there's another hug or pat. thanks a lot. to libya now where nato has laujed one of its heaviest bombardments yet on moammar gadhafi's compound. the latest strike on tripoli began in the early hours of tuesday morning, more than a dozen explorings shook the city and lit up the night sky. look at this. gunfire from antiaircraft guns and ambulance sirns were right across tripoli. nato says its missile hit a storage facility used by gadhafi

regime but libya government says the target was aa base for military volunteers. they say people living nearby were hurt. spokesman says three people died and 150 were wounded. let's go to tripoli to our correspondent. this attack came just hours after a u.s. envoy was in benghazi and called for moammar gadhafi to step down, right? >> reporter: yes. the u.s. envoy sent a very clear message, reiterated the message the alliance has been sending to colonel gadhafi and hours after that message came out of the east, the nato strike began. it was, as you said, about 1:00 in the morning. within half an hour we had over a dozen strikes. we counted about 18 here. all last week we were talking about it intensification of the bombardment of tripoli. nato trying to escalate quite sharply. yesterday was the highest, sharpest escalation we have

seen. coming so soon after the u.s. envoy's visit, it really sends a message they are trying to be relentless, they are trying hard to maintain that pressure on colonel gadhafi and inner members of his circle. >> how much does it hurt the gadhafi regime and military ability? >> reporter: well, our understanding is that definitely in terms of the message that's being sent to gadhafi, that those around him, that there are some of those around him trying very hard to communicate to him that unlike in 1986 when the u.s. bombarded, this is not a situation they feel he'll be able to wait out. and yesterday's bombardment will add weight to that message for them, that this is not something as with your previous experiences with the west that you will be able to just sit out. this time you will have to go,

zain. >> nima reporting from tripoli. you're watching "world one" live from london. a killer tornado. the storm that claimed over 100 lives in joplin, missouri. talking up his plans for peace, israeli prime minister preparing to address u.s. lawmaker. is he going to say anything new? , building up our wireless network all across america. we're adding new cell sites... increasing network capacity, and investing billions of dollars to improve your wireless network experience. from a single phone call to the most advanced data download, we're covering more people in more places than ever before in an effort to give you the best network possible. at&t. rethink possible.

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leaked information about an air france flight which crashed in the atlantic ocean nearly two years ago appears to show the pilot was not in the cockpit when things started to go wrong. sources say the aircraft's flight recorders reveal air france stalled. the airbus a-330 crashed en route from rio to paris, killing all on board. jim bittermann joins me from paris with more.

does this make it any clearer who was to blame? >> sequence of events seems to be about the same what we heard shortly after the crash but there was the question if the senior pilot was in the cockpit when the trouble started into the flight. basically, that's pretty much standard procedure. there's three pilots on these long distance flights and senior pilot takes the plane off and lands it. in between times takes a rest break to be ready for the landing. in any case, it was not necessarily unusual he was out of the cockpit, but according to the reports that are coming in, basically he was outside the cockpit and then rushed in and tried to take charge. there was a great deal of confusion in the cockpit about exactly what was going on. but it should be taken with some caution because the fact is that there's a lot at stake in terms of lawsuits and all other things. the reports seem to indicate the

pilots may be to blame but the tubes that froze over, why they were still used on air france flight even though there were long-standing problems with them. >> how have the families of the victims reacted to all of this? >> well, i think they're in a kind of wait and see mode. this is not the official report that's come out. this is just leaks. we're going to see more apparently on friday from the bae, the investigating agency here in france. and i think they are very impatiently waiting for the real judgment to be made. but there are certainly potential lawsuits here involving family that could be fairly large. >> cnn's jim bittermann reporting from paris. you're watching "world one" live from london. if you thought this was the end, think again, okay? a preacher explains why the apocalypse is running a little late. find out his new precision. our sports update as dallas

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the roar of a beast. that is the sound of the deadly tornado that ripped through joplin, missouri. officials say it killed at least 116 people. no u.s. tornado has taken more lives since records began 60 years ago, although a storm in michigan back in 1953 did match it for casualties. in joplin, 17 people have been pulled out of the rubble alive. gary tuchman takes a look at the search and rescue operation. >> reporter: here in joplin, missouri, the weather is horrendous, the rains are coming down. we see lightning flashing in the sky. but the rescue effort continues. the hope is they find people

still alive. the facts are this -- you can find people alive days after, especially with the rain coming down because the rain provides water for survivors who might still be in the rubble. that's the optimistic way of looking at things. the pessimistic way of looking at things, this is one of the worst tornado disasters in the history of recorded united states meteorology. we're standing outside a hospital right now that was hit. the hospital is heavily damaged. it's not even clear how many people were hurt inside the hospital, how many people were killed inside the hospital. what's amazing about the situation, i spent a couple of weeks in japan after the earthquake and tsunami. obviously, a very different event than a huge tornado. but it looks exactly the same. it was deja vu when i arrived here. you see streets that are totally nonrecognizable. you need your gps in your car to find the streets because there's no landmarking anymore. houses were picked up and brought two blocks away, three blocks away in some cases.

this particular block, all the buildings, except the hospital, are gone. there's just no way whatsoever to recognize the buildings here. that's exactly what we saw in japan. two terrible tragedies that we're dealing with in this country. they're still dealing with the wreckage from the tsunami and now dealing with the wreckage here in the united states in the state of missouri. gary tuchman, cnn, joplin, missouri. one big fear now, more tornadoes. is that going to happen? let's go straight to our meteorologist jen delgado. is it? >> yes, that's going to be a big threat today. we're looking at the potential for a moderate risk as well as high risk for severe weather to pop up later on this afternoon. as i show on you the radar right now, yesterday, look at all those watches we had out there. we still have a few. notice, we had heavier rain through through areas including parts of joplin. that video showing you the devastation left behind that region and today we're talking another threat for severe storms because we have all this gulf moisture down toward the south.

at the same time, colder air riding in from the west. this is going to be the perfect setup today for those severe storms once again, produce tornadoes. anywhere in orange this is our moderate threat and anywhere in parts of southern kansas as well as northern parts of oklahoma are going to be dealing with the high risk and high risk is exactly the situation we had last month when you remember we had all those deadly storms and tornadoes that moved through parts of mississippi as well as alabama. now to give you an idea of how bad the situation has been this year, so far we have 482 tornado deaths. we've had 49 tornados that have produced those deaths. you can see, that's well above the average from 2000-2010. this is the deadest outbreak since 1953. our other big story we're tracking which is what's happening with the volcano in iceland and eruption there is. as i take you over to this traffic quickly, hopefully we can show it to you, notice

what's happening in the yellow and gold shading there. that is actually the ash cloud being reflected. what you're seeing is that ash cloud actually moving towards parts of england. that's why they're saying -- they're expecting that ash cloud to spread over all parts of british airways as we go through tomorrow. that is likely going to be light concentrations. as i take you back over to our weather graphics here, as we show you on our graphic, anywhere in red, that's the advisory area. yellow is light concentration. red and orange, that's the more problem area and the area you probably want to pay nor attention to, including parts of ireland as well as possibly into areas including scotland and northern parts of england. in threat is going to last as we go through today. that's why flights have been actually canceled through parts of northern england as well as into scotland until 2:00 local time. even here you can see we're

predicting that ash to spread down to the south, even up until 6:00 this evening. back over to you, zain. >> oh, no, not again. >> not again. >> oh, no. why? >> it doesn't sound as bad as last time, though. >> we'll keep an eye on it, jen. juror watching "world one" live from london. here are some other stories we're talking about today. take a look at this car. this is the one in the u.s. president's limo convoy. guess what happened to it? boom, right there. coming out of the ramp out of the u.s. embassy it gets stuck. it happened and some onlookers were thinking that was actually the president's boom-proof cadillac known as the beast but it wasn't. the secret service says it was a spare limo carrying staff and support personnel. nojs, a scene like, this you really don't want to have on such a major trip with the u.s. president. it's embarrassing. that was stuck for a few hours. the recovery truck had to move it out.

doomsday preacher who predicted the world would end on may 21st said oops, he made an error of interpretation. harold camping says the end of the world is coming on october 21st. he had forecast jesus would come back to earth on may 21st and it would mark the end of the world. now, he says god's decided not to punish humanity with five months of destruction before doomsday. british comedian russell brand has been deported from japan where he was with his wife, the singer katy perry, on her concert tour. perry wrote on twitter that her husband was deported for offenses that happened ten years ago. brand, well, he took a pretty lighthearted view of the whole thing and he had this tweet. planning escape from japanese custody. it's hard to dig a tunnel with a chopstick. you're watching "world one" live from london.

stay with us. we'll bring you the latest on the u.s. president's visit to europe when we come back in about an hour and a half he and michelle obama will arrive at buckingham palace. [ female announcer ] need help keeping your digestive balance? align can help. only align has bifantis, a pantented probiotic that naturally helps maintain your digestive balance. ♪ ooh baby, (what) can i do for you today? ♪ try align today. i know it's sort of my weakness. i always keep it in the house.

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hi, this is "worldwide" live from london. here are our top stories. nato has laumpked one of its heaviest air strikes against the regime of moammar gadhafi. they say they hit a base used by government vehicles. libya says it was empty at the time but people living nearby

were hurt. spokesman says three people died and 150 were wounded. in the u.s., the national weather service says there is a 45% chance of another tornado outbreak across a large area of the midwest, including the devastated town of joplin. 17 people were rescued from the rubble yesterday but the number of people killed by the tornado rose to 116. bosses at japan's fukushima nuclear plant say the meltdown caused by the march earthquake was even more serious than previously thought. fuel rods in three reactors are now thought to have melted within just a few hours of the quake. earlier officials said that that had happened in just one of the four operational reactors. media reports are saying dna in a sample taken from dominique strauss-khan reportedly match evidence taken from the clothing of a woman who says he tried to rape her. the new york times and wall street journal both carry that report saying they were quoting

a source close to the case. the dna result is in line with what strauss-khan's legal team is saying, there was a consensual sexual encounter. in libya nato air strikes have hit targets in tripoli. it's been one of the largest bombings yet. a libya government spokesman says three people died, 150 were wounded. while tripoli is the seat of power for gadhafi, just one hour away, rebels are training. cnn's nic robertson is with them. >> reporter: weapons training in rebels's stronghold barely more than an hour's drive from tripoli. raw rebel recruits getting the skills to overthrow moammar gadhafi. none are as close to libya's capital as these. the town is tiny. at the eastern end of the finger mountain reaching back to the

border. resources are tight, bullets counted out. every volunteer is needed. this training can't come soon enough. gadhafi forces are as close as ten kilometers, six miles from this town. they are afraid some of nearby villages and towns are about to fall to his forces. some of these young fighters here have already been in the front line, even though they haven't finished their training. >> it was encouragement for us. really it was good. >> reporter: in this, the only rebel holdout in western libya, training takes a backseat to battling. this day no exception. thank you very much. >> thank you. >> reporter: what's that we're listening to? >> i think it is gadhafi regime. they shoot the city by heavy

weapons. we hear it now. >> reporter: so what we're hearing, heavy explosions employing off in the distance. it's hard to see where. two days ago the explosions were over here. that's gadhafi's rockets being fired. we've heard two sets of a repeat of four different rockets, missiles, being fired. at the front line, rebel fighter ab dal watched hopelessly as rockets flew over his head. >> yes. this morning he started to shoot about 16 missiles from two attacks. >> reporter: you can see they're happening? >> yeah, we can see them. >> reporter: what can you do when you're sitting here? what can you do about that? >> nothing, nothing. >> reporter: why not? >> because we don't have missiles or heavy weapons to defend. >> reporter: after three months of fighting, this 31-year-old field engineer has all the experience he can stomach. but says it is paying off. >> it's disgusting. it's disgusting to see that.

believe me, most of the people -- when we talk, they didn't want to kill anybody. >> reporter: so, slowly you're getting better trained -- >> yeah getting better and trying to do our best. i mean, have you to obey the people who has experience. >> reporter: the lesson here, it's going to take more than experience and training to win. on these front lines, rebels say they desperately need help. it's pretty basic blanket for the soldier to sleep on. an ancient machine gun here. a few rocks to protect this defensive position. they say gadhafi's forces are just on the hill over there. that's a big concern because they say if gadhafi's forces take control there, they will threaten this valley and threaten to crush and push back rebels when this thin sliver of land in the west of the country, the mountains toward tripoli. the capital of tripoli, about 80 miles in that direction. near but for these rebels, still

too far. nic robertson, cnn on the front line outside zintan, libya. israel's prime minister netanyahu will speak at a joint session of u.s. congress just days after he rejected president barack obama's outline for a mid east peace deal. mr. obama says starting point for negotiations on a palestinian state should be based on israel's borders before the 1967 six-day war. the u.s. president's stance on those bored rz were initiatives of former presidents bill clinton and george bush. mr. net yanyahu says they will indefensivibl indefensivible. >> we can only make peace with palestinians if they are prepared to make peace with a jewish state. tomorrow in congress i'll

describe what a peace between a palestinian state and the jewish state could look like. but i want to assure you of one thing. it must leave israel with security, and, therefore, israel cannot return to the indefensible 1967 lines. >> for more on this, let's go to kevin flower in jerusalem, joining us now. hi, kevin. what does prime minister netanyahu want to achieve with this speech? can he say anything we haven't already heard? >> well, zain, it's unlikely we're going to hear anything revolutionary new from the israeli prime minister but he does have a few objectives here. one of the first objectives is to shore up his support from washington lawmakers. congress is a traditionally friendly audience for israeli leaders. he will be looking to basically convince them that his vision for middle east peace, peace with the palestinians, is the vision that should be supported,

even if that is at odds with what president obama laid out in his speech last week. secondly, he's going to be trying to speak to the international community saying to them, you need to oppose palestinian efforts to achieve u.n. recognition for a palestinian state at the united nations in september. now, we're also expecting the israeli prime minister to lay out his vision of what a nlgted settlement with the palestinians could look like but it's a vision that is unlikely to be welcomed by palestinians. this is what one palestinian official told us yesterday about what they've been hearing from netanyahu thus far. >> we are waiting for the prime minister of israel. we accept two states, 1967. he can say it in hebrew, arabic, chinese, english, latin, french, russian, any language. without him saying that, without him accepting that i think we'll

continue wasting our time as we did with many of those we thought tough negotiators turned out to be nonnegotiators. >> reporter: zain, it's fairly clear that the israeli prime minister is not going to be uttering those words in his speech to congress today. leaving a lot of people somewhat apprehensive about the road forward in terms of negotiations. >> cnn's kevin flower in jerusalem. palestinian prime minister fayyad is recovering in a u.s. hospital after going through a procedure to clear a blocked artery. he was in the u.s. for his son's graduation but then he had to be rushed to a medical center in austin, texas, after he complained of severe chest pains. doctors discovered that the 59-year-old's coronary artery was blocked. his condition isn't described as serious and he should be able to leave the hospital in a couple of days. u.s. president barack obama is in britain for a three-day state visit.

he'll be meeting queen elizabeth and new duke and duchess of cambridge, will and kate. he'll take part of a wreath-laying ceremony at westminster abbey, then he'll spend the next couple of nights although buckingham palace. let's see how newspapers are responding. irish independent headline reads -- rhetoric warmed our hearts but speech ignored our big problems. it says a patchy history lecture filled with cliche about fighting, resilient irish. belfast telegram says, on blustery day his charisma warmed even the chilliest soul. waves of emotion poured from the crowd. of them young people who have found themselves facing bleak option at a time when their dreams are shattered with every new convulsion of economy. the independent in england -- a

sharing relationship will be put to the test. british officials are playing down any need for policy initiatives. there are more than enough dramatic events going on in the real world to keep them busy in their bilateral talks. finally, just check out the "ti" "times" of london. the headline here, it says that all not just special but an essential relationship. one issue, many views. you can read all of these articles in full at facebook.com/w1cnn. let's go back to one of our top stories -- the president's visit to britain. it's a state visit. we want to tell you what exactly a state visit is, okay? here to help us answer that question is royal biographer mark sanders. what is it? >> it's quite complex. a state visit is when a head of

state has been invited by the country and being hosted by the queen. as opposed to a private visit. now, there have been -- woodrow wilson had a state visit, kennedy -- president kennedy, and george w. bush, but many other american presidents have come here but in a private capacity. most famously ronald reagan who was hosted at windsor castle. it's just an invite from the queen. doesn't constitute a state visit. >> a lot of other protocol that goes along with it. give an idea, what will it be like in buckingham palace, where is he staying? >> yes. it's notoriously cold in buckingham palace. >> they can afford some heaters there, come on. >> everybody who stays there says the same thing. you're always told to bring an extra jumper. he's staying in the belgian suite, a number of rooms which constitute the belgian suite. it was named the belgian suite after king leopold.

the trip's all-inclusive so meals and drinks are included. a minor banquet. there's always this problem, going back to 1776 a little bit here, but always this problem, do you bow, do you accept the protocol other european heads of state will accept? nancy reagan said she would not under any circumstances -- >> do you think the obamas will? >> i think barack obama is a man that -- that -- he would do it out of respect, i think, but i don't think it would be a major issue. certainly -- i remember we all hoped they were going to come to the wedding but there was never this question, would he bow? i think he'll respect the queen. >> they have a warm personal relationship. remember the -- the back pat by michelle obama and the queen and queen reciprocated by putting her arm around her waist. it was a big deal at the time.

they do have a special dynamic. >> always a special relationship. let's not forget, two-fold, the business is not just personal. there are serious foreign policy issues that have to be discussed. but today is the fun day. president obama is very popular in europe. he's also -- he's on course for an election next year, which he should win, hopefully, many people would say hopefully. so i think yesterday in ireland was a fantastic day for him. he certainly secured the irish vote yesterday. and today americans love visits to britain. i think he'll secure more votes. >> what can we expect at the banquet? he's giving a speech, the queen is giving us a speech. give us color on the protocol. >> it's amazing. frightening, in fact. >> really? >> you'll have three very long tables. obviously, the president will be at the head with the queen. there are about 48 different knives and forks on each side. you do actually -- you're given a note when you first arrive -- >> really? which knives and forks to use?

>> so you know, always start from the outside. the outside, you could be imposing on other people's territory it's so vast. >> wow. >> it will be dressy dressy and a lot of uniforms. but, again, the president's goinging to bring his own personality to this. we know the queen likes him. and i think if his speech is as good as the one yesterday in ireland, then, certainly, it will be fun. >> who's invited? there are, what, 200 people? >> yes. various dignitariedignitaries. the american ambassador, who's going down so well. so, if you are invited to this, i think it's second only to the wedding itself, this one. >> nobody can crash this easily, hopefully. >> not even harry. >> not even harry, all right, all right. thank you so much. millions spent on the security for this trip. thanks so much. you're watching "world one" live from london. the airborne ice lan diland

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you're watching "world one "as that volcano in iceland continues to worry people flying. that plume of ash is going to spread into all of british air space within the next 24 hours. european officials say air space over denmark and scandinavia are also going to be effected. the latest information from we have is that 252 flights have been canceled so far. most of them are flights to and from scotland, but one airline is challenging the advice not to fly. it's ryan air. they say all these restrictions

are really not necessary. most of the effected airlines say they're going to review the situation around 1 p.m. gmt. we'll keep an eye on that story for you. hopefully your travel plans won't get disrupted. a big german is leaving his mark on this year's nba playoffs. [ speaking foreign language ] >> wow, i didn't know. yeah, exactly. i'm going to talk to you about this big german, dirk nowitzki, made a huge impression on the game last night. very key player. always is and particularly last night. going to start with the latest from the playoffs for you. monday night, the mavericks, nowitzki's team in oklahoma looking to swing game four of the western conference finals. it was a big task looking to win two in a row on oklahoma's home court. after the game the mavs' coach said the game tested the courage and mental strength of his team. it was a test that dirk nowitzki

proved he was more than up to. oklahoma city's kevin durant hugging his mom before game four. trying to even the series with the mavericks 2-2. to the fourth quarter, oklahoma's big lead of the game, 15. dirk nowitzki was huge for dallas down the stretch. mavs down ten. nowitzki with a three from the top of the key. then he hit the tough off-balance jumper and then the german knocks down the fallaway jumper. and dallas back into this game, thanks to his performance. 101-98 now the school. just over six seconds on the clock. dirk scores to tight game. that means the game goes to overtime. nowitzki scored nine of the mavs' last points, making the difference in overtime as well. he would finish with 40 point. the mavs win game four and now

the series heading back to dallas. it's looking good for the mavericks. this saturduefa will be pla saturday at wembley stadium. voluntarily cannish ash cloud is threaten to disrupt european air travel this week. barcelona ruled out the possibility of postponing the game saying they'll fly on tuesday, two days ahead of schedule, if that is necessary. the problem won't then be as much for the team as it will be for the fans hoping to travel to watch the game. 12,000 barcelona fans are scheduled to head to london saturday after. the match is a repeat of the 2009 final in rome, which barca won 2-0. the manager is trying to take the pressure away from his team. >> we are competitive. necessity are a strong team.

they can make four, five lineups without problems and four, five lineups are always competitive. so, it's one of the best teams of the world. just this year, you know, the last five, ten, 15 years. >> he actually said after that that everything, absolutely everything about manchester united scares him. >> kate giles, thank you. look out, here it comes. more on that ash cloud that is now heading for britain and mainland europe. we'll be speaking to an expert on what exactly is up there and what's different this time around. we'll take a closer look at that ugly ash.

welcome back. you're watching "world one "live from london. we're coming up on 6 a.m. in new york, noon in tripoli, 7 p.m. in

tokyo. travel plans of thousands of people are now in doubt as the ash cloud moves from iceland and further south. the uk's official weather center is telling cnn that this plume will cover all british air space within the next 24 hours. so far 252 flights, mainly out of scotland v been canceled. we want to talk to an expert who can tell us more about what's going on and a reality check of that ash. dr. watson is a lecture at bristol university and joins me now on skype. hi there. how much of a threat is this ash? >> oh, well, let's -- let's not -- if an aircraft flies through a dense ash cloud it's in real trouble. this stuff is like very, very fine sand or glass. you mentioned what would happen if you took a piece of sand paper to your car, that's roughly what would happen to an aircraft. it's very bad for the engines

and wind speed as well. >> we've been hearing the difference in this ash is that it's coarser and falls faster whereas the ash from last year was finer and posed more of a threat. that doesn't really matter, does it, when it comes to this situation? >> well, i think there's quite strong evidence no matter what the particle size is, once it hits the engines it gets smashed into very fine pieces. the good news about this ash, because it's larger, it's likely to fall out faster. that's the key thing. >> what's your advice to travelers? >> well, i think the same as everybody else, really, you know, just listen to the radio, the tv, go on the internet. certainly talk to your airlines. certainly, if you fly from northern england or scotland, really watch out. you know, it's going to be bumpy for a few days, i think. there's some suggestion the eruption might be waning slightly but in the short term i think there will be some disruption for sure. >> how long can this go on for?

how long can ash keep spewing? >> i think if we look back to previous eruptions of grimsvotn, they typically don't last too long. mostly of a week. this is following the same pattern. most of cloud went to the north and now it looks, fingers crossed, that things are slowing down a bit. there are no absolutes, of course. is an an inprecise science but let's hope for the best. >> dr. matthew watson, thanks. you're watching "world one" love from london. thanks for joining us. we want to show you more pictures of those dramatic images of tornadoes forming in the us of the midwest. one of america's deadliest tornadoes on record striking on sunday. in a few minutes the u.s. president, barack obama, has

announced he'll be traveling to missouri to visit the scene. i'm ali velshi reporting live from joplin, missouri. 160 fatalities are confirmed and that number could climb a lot higher. hundreds, even thoughs of people may be trapped and search and rescue teams are being hampered with thunderstorms and lightning with the threat of more tornadoes in the forecast today. 2,000 homes and buildings around me have been damaged or entirely destroyed but from the rubble comes home. 17 people have been found alive. their stories ahead on this "american morning." building up our wireless network all across america. we're adding new cell sites... increasing network capacity, and investing billions of dollars to improve your wireless network experience. from a single phone call

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