>> optimism surrounds new talk to run a rant. a deep -- around iran. greek riot police stormed the headquarters of former state broadcaster ert, saying dozens of protesters who moved in five months ago when the station was abruptly shut down over money. and the most eagerly awaited chair listing of the year. twitter puts shares on sale -- share listing of the year. twitter put shares on sale. new nuclear talks on iran are being held in geneva, iranian

leaders sitting down with six world leaders to hash it all out. it is the second leading -- the second meeting in less than a month, leading officials to think that a deal could be close at hand. a there is hope in the air in standoff that has dragged on for a decade. the cautious optimism comes only weeks after iran presented a closely guarded proposal at talks in geneva, paving the way for a fresh meeting thursday and friday. it is fresher to grasp for a landmark -- in the pressure for grasping for a landmark nuclear deal. said thejavad zarif deal could happen as early as this week. >> i believe it is even possible cannotthis week, but i talk, i can only talk for our side. i cannot talk for the other side. albeit with an air of

caution. >> if the arabians are prepared to address the core issues, we can adjust what we have seen so far. i don't think anyone is expecting instant results. this is a negotiation process. as we are hopeful we can make considerable progress. the atmospherics and the talks have improved, the country's highest power says iran will not concede what he considers to be its right to nuclear activity. >> i am not optimistic. i do not think the associations will lead to the result desired by the iranian nation. it is not clear whether the results will be achieved. >> iran has always insisted its nuclear program is for peaceful civilian use. --iching you really enriching uranium to 20%.

he is a short step to making a nuclear weapon. geneva, to our correspondent with john. there has been so much secrecy surrounding the meetings today. what have you found out so far? >> the readout from the said that the meeting was a good opening session. that is a very good sign. the meeting lasted for 45 , and lady ashton met with the foreign minister this morning and is meeting with him again this afternoon. bethe afternoon, there will technical sessions and also bilateral meetings between the various participants. so there is a lot of action. momentum in these talks to get to an interim deal, where the iranians would freeze some of their programs.

to freeze their enrichment program and in exchange the west would give some sanctions relief for a six-month period which would be verified by external partners such as the international atomic energy agency. that is the format, but we have to see what goes on with these negotiations. they are dynamic but there are expectations that any initial package will emerge by tomorrow evening. >> there are two key issues at stake -- stopping nuclear enrichment, and for the raid ash for the iranians it is stopping sanctions. tell us more about that. >> well, for the west, they want a verifiable regime, that any forear program iran has is peaceful purposes and does not have the capability to produce byproducts going into making a nuclear bomb. the concerns are about the

enrichment process and the bigger concern is having full access to the so-called heavywater reactor building. that is a major concern because once that is up and going, it would be impossible to take it out without creating a nuclear disaster in the region. in exchange, the arabians want to live -- the iranians want a listing of the sanctions that are crippling their economy. it is a big nation and the regime is concerned the economic situation, if it deteriorates further, can have serious repercussions for the regime. these are the two dynamics playing here, and the domestic audiences on both sides -- the americans are under pressure from congress and israel not to go to bank easy on the sanctions o easy on go to the sanctions, but they are negotiating in good faith -- in other words deliver some

commitment that these talks are serious from both sides and that there is confidence building up after decades of mistrust. that is where we are at in geneva. >> thank you, john, reporting on those tough negotiations. state john kerry has prolonged his trip to the middle east by one day. he says he will go back to israel friday for another meeting with prime minister benjamin netanyahu. for the moment, he is in jordan on what should the the final stop on this trip, aimed at salvaging the talks. section of alcan qaeda says it is responsible for the two journalists shot dead saturday. to avenge "france's crusade in mali."

silence,four days of the call has finally come through. a group linked to al qaeda's north african branch told him or attain in news agency frequently contacted by a few mists. they say they are responsible for the two french radio journalists in northern mali saturday. >> this operation was a response to the daily crimes committed by friends -- by france against mali and's. >> is a claim of responsibility being taken seriously at the heart of the french government. >> we are currently verifying the claim, but it seems possible because previous claims of responsibility by the al qaeda and islamic my grab -- islamic

my grab -- >> the journalists were shot just four days after the release of other hostages. motive remains unclear. four men have allegedly been identified thanks to a document found. two of them have been arrested according to investigators. they are currently known to investigators -- presidentto french francois hollande, the murder investigation is moving forward with french police working alongside malian security officials on the ground. at least 35 suspects in total have reportedly been arrested so far. shell,sty is accusing the biggest petroleum reduce or in nigeria, of manipulating investigations into oil spills. they say shell has wrongly

reported on the cause and the volume of pollution devastating the niger delta. they also say shell has made false claims about cleanup measures. shell nigeria rejected the accusations saying they are without substance. earlygo to greece, where this morning before dawn riot police stormed the former public tv station ert. it was closed in june due to greece's crippling financial crisis, but dozens of ex- employees had been squatting the building and broadcasting illegally in protest. for more on the story, i'm joined by natalie zachary guess -- natalie. >> we are outside the headquarters, and it has been 10 hours since riot police stormed the building early in the middle of the night really, ousting the employees who were still there.

four to five months on a 24-hour basis. a scuffle ensued when the protesters tried to reach the building. outsided was assembled in support of the workers. they were trying to get in in order to prevent them, push them back. -- at the mp's moment, there is a return to calm and we are waiting to see how the authorities will proceed on this. >> tell us more about what the authorities or the government has had to say since it happened early this morning. >> they are saying it has been an illegal occupation for the past watch wrote to five months. -- the last four to five months.

they are calling this mood here, dictatorial in the way they operated. the journalists in greece will be staging support of their colleagues. but the deputy minister, who is the new public broadcast has been operating the past month. the new broadcaster of greece will be operating from the headquarters, from the building we are seeing on our tv screen now. the headquarters of the former state broadcaster ert. >> thank you. awaitede most eagerly share listing of the year. mark edwards reports on twitter. >> it is the hottest ipo of

2013. footer is launching on the new -- twitter is launching on the new york stock exchange with 76 million shares offered at $26. company which is never post a profit since its inception in 2006. the warning sign for some that the san francisco-based social network has been valued too highly. at $20 billion potentially without any profit at this point or we think theugh next year, we think margin of safety is a lot more narrow than for other companies. >> nevertheless, the foundations are certainly in place. by 280vice visited million people every month, including the president and celebrities. twitter's ipo will make it the biggest market debut for a firm public in or went

2012. investors will be hoping for more success than mark zuckerberg's entry onto the stock exchange. -- it was marred by delays with problems and orders. shares in the world's biggest social networking site plunged to below half their opening price in the following months before returning strongly in the third quarter of this year. >> the olympic torch is continuing its round the world trip with one spot completely out of this world. a rocket carrying the olympic flame blasted off from russia. thetorch is on its way to international space station before it will be taken into space itself on saturday. that will be the olympic flame's first ever spacewalk in history. there is one caveat. for safety reasons, it will not burn when it is on board the safe that's -- when it is on

board the space station. >> we have liftoff of the soyuz rocket, delivering three more -- >> this is an important showcase for russia. taking the unlit torch to the international space station. it is not the first time in olympic torch has been in orbit, but the trend will be broken saturday when two russian cosmonauts take it on a spacewalk. embracede already the idea that we, too, are part of the olympic movement. we now wish that athletes would embrace the idea that they areprogram participants. now ramthey are participants. covering some sissy 5000

kilometers in 136 -- 65,000 kilometers before arriving on the black sea resort before the opening ceremony on every seven. the games have challenges, too, called -- a ban on so- protesting so-called gay propaganda in russia. promoting social inclusion without discrimination. 24.:u are watching "france " stay with us. >> welcome to the weekend america's. more pragmatism, less ideology as the u.s. election cycle starts. the tea party narrowly beaten in virginia. the rumors were true. harried by a media campaign over alleged drug use, toronto's

mayor admits to smoking crack cocaine. we do start with the return to the electoral season in the u.s., americans making a clear choice in some of the biggest boats. his diblasio trouncing republican rival in new york for the key to the mayor's office. virginia.sey and in in new jersey, chris christie won reelection as governor. campaigned with support from the clinton's and barack obama. his republican rival, ken cucc favorite,tea party gained ground. >> this election was never a

choice between democrats and republicans, it was a choice about whether virginia would continue the mainstream bipartisan tradition has served us so well over the last decade. >> in democrat leaning new jersey, republicans fared much better. voters reported -- rewarded chris christie. his estimates it's falling -- following superstorm sandy a year ago, and he was reelected as governor with a little over 60% of the vote. >> she saw me and she burst into tears. born in newark, raised in livingston. i made my wife, from pennsylvania, a real jersey girl. i raise my family in this amazing state. i raise -- i love it as much as my mother and father raised me to love it. >> he's being touted as a

republican contender for the 2016 presidential race. a democrat mayor in new york for the first time in two decades, sio presents himself as a liberal progressive alternative for the big apple. talehave spoken about this of two cities, that feeling of a few doing very well, while so many would slip further behind. that is the defining challenge of our times. >> he focused on policing issues and addressed the lack of affordable housing. orhas promised to build preserve 200,000 low income apartments in a city where rents have spiraled. he will face challenges.

his plan to raise taxes will be need to be approved by the state government. staying with election results, michael bloomberg heads off to new horizons. it is it chance to evaluating the changes he has wrought. bloomberg has helped oversee the development of the greenest site , the big apple, from a .uspended park catherine clifford has the story. >> the flight over new york confirms the city is getting greener. central park has always been there, but these trees lining streets in the heart of manhattan are more recent. the same for these parks at the foot of the brooklyn bridge. this pilot has been surveying the skyline for 30 years and appreciates the change. >> this was a rundown. area previously. now it is beautiful parkland. manhattan all rebuilt.

>> perhaps the most original park, a disused railway tracks makes its way around manhattan above ground level. infested,ted and weed it is a must-see for tourists all over the world. it is fascinating to see this in the sentry town. we are surrounded by greenery but at the same time there are these buildings around us. it is dorie -- it is disorientating. it is ready. preserving the idea of an industrial wasteland. another iconic image of new touch,iven the greek times square. a decade ago it was bursting with traffic and fumes, now partly pedestrian. all tables and chairs attract 52 million tourists per year for a much needed rest. walk quiteo have to

a bit. now i can take a seat. people want to stop in times square. >> on the other side of manhattan, brooklyn has some new picturesces, including with the perk -- best view of manhattan's skyscrapers. the land used to belong to warehouses closed to the public. no more families and in particular french families are choosing to live in the neighborhood tucked away from the hustle and bustle. picnicsme down here for and meet the kids' friends in school. there are plenty of buses, and it is only five minutes by taxi. decade, almost 400 hectares of green space have landscape,art of the almost the size of central park. by theunning admission mayor of toronto, rob ford. yes, he has smoked crack, yes,

he is sorry, and he is planning to run for reelection. >> a heartfelt and emotional apology. >> i know i am embarrassed , and i willthe city be forever sorry. >> this apology followed an earlier admission that he indeed smoked crack, something he previously denied. >> yes, i have smoked crack cocaine. am i an addict? no. have i tried it? probably in one of my drunken stupor's. said theyter police had video of the mayor puffing on a crack pipe. it has not been released. have enlisteds sympathy among voters. the cause had been mounting for the mayor to step aside. people dodrink,

different things. he is doing his job. >> the mayor stunned many that despite the revelations he wanted to continue doing the job he loved and has no intention of resigning. job,was elected to do a and that is exactly what i am going to continue doing. he said it is up to the voters to decide whether he should leave office. he will have that chance in 2014 as pressure continues to build with many fears that the city is becoming a laughingstock. >> toronto. are planninggues to submit a motion asking him to take a leave of absence. isnow to columbia, in what one of the world's dangerous cities. -- after the death of pablo escobar, the revamp is

attracting tourists. it was consider the moore -- the world's most dangerous city a couple of decades ago. just saying the world medellín conjured up images of gang violence, drug cocktails. whomarxist guerrillas recruited in the city' neighborhood. contrast,in sharp "the wall street journal" named it the world's most innovative city. it has changed due in part to heavy policing. officers patrol areas around the park. the plans are for more officers on duty in the coming months. there is traditionally a culture of easy money here. young people influenced by joerg trafficker's have learned how to dashteer and imitated a

and intimidate people. we are teaching people not to put up with this, and we make more arrests. >> one innovation has been the construction of the cable car linking the port district to the city center. can't mute inple and out easily so that there are other options apart -- can commute in and out easily so that there are other options. areas once too dangerous to visit art came to bleed -- to visit are now tangibly different. people used to be paramilitary, but they each gave up their weapon to reintegrate into medellín life. a gang killed my brother so i joined a rival candidate -- a rival gang to avenge him. they gave me weapons. i was scared, my family, too. to havee up the life

values. isthe medellín crime rate eight times what it was 20 years ago. the mayor is cracking down the social welfare and community center policy. localare developing schools and cultural projects. we are not giving drug traffickers any 's we are proposing other things than drugs and violence. >> medellín is ranked less dangerous than washington, d.c., and rio de janeiro. to of the city's budget goes welfare projects. this shadow

>> three british workers -- abbas tarver, a midwife, and a , aamedic. -- a bus driver midwife, and a paramedic. they do their jobs in some of the toughest conditions on the planet. >> that was a really cruel birth. >> that is one satisfied customer. >> how do you guys do this in these conditions? is leaving her home in the welsh valleys and her job as a cardiff paramedic to work in guatemala city