presidential nominees face off one final time before election day and leave the nation wondering if the results will be contested. >> what i'm saying is that -- >> i will tell you at the time. i'll keep you in suspense. >> well, chris, let me respond to that because that is horrifying. >> now democrats and republicans

the outcome of the election. good morning from the studio 57 newsroom at cbs news headquarters here in new york. good to be with you. i'm anne-marie green. four days now donald trump has warned that the upcoming election would be rigged. in his third and final debate with hillary clinton, trump took his concern to another level. in a stunning reply, trump refused to say if he would accept the election results. the republican national committee immediately weijia jiang is in las vegas. good morning. >> reporter: good morning. the night actually started off calmly and it looked like it was going to be a policy-driven debate. in fact, the first question was about the future of the supreme court. the candidates clashed over their dramatically different plans for the country, but a heated conversation quickly spiraled into a personal confrontation. >> such a nasty woman.

>> reporter: sin city showdown ended as it began without a customary handshake between the presidential nominees but one of the most controversial moments of the night came when donald trump refused to said if he would accept the outcome of the general election. >> i'll tell you at the time. i'll keep you in suspense. >> that is horrifying. every time donald thinks things are not going in his direction he claims whatever it is is rigged against him. >> reporter: at least three republican senators, including arizona's jeff flake immediately condeemed the remarks on social media as it clinton's campaign. this group of uncommitted voters was left undivided. >> a lot of the population from the political process to say no matter what the results are, i will be okay with it, without knowing what is going to happen, i don't think anybody would do that about anything that was serious. >> reporter: the third and final debate here in las vegas was dominated by substance from

>> from everything i see has no respect for this person. >> well, that is because he'd rather have a puppet as president. >> no puppet. >> in the states and -- >> reporter: both candidates addressed their looming controversies as well. clinton on her family foundation. >> everything i did as secretary was in furtherance of our country's interests. >> reporter: and trump on the numerous sexual assault allegations against him. >> i think they want either fame or >> reporter: voters get their say in less than three weeks when they head to the polls on election day. the republican national committee says it will accept the general election results even if its nominee does not. spokesman shawn spicer says the rnc will respect the will of the people, but he quickly added it probably won't be an issue because trump will win. >> weijia jiang in las vegas,

mark an unprecedented departure in the history of this country. >> this is very, very unusual. i mean, it raises the question what will he do if he doesn't accept the results? i assume he is talking about filing a lawsuit or something. surely he's not thinking about trying to stage a coo. what is he talking about here? this is not the way we do it in the united states of america and can say it. it's dangerous to be talking that way because it threatens and raises questions about the very foundations of what this nation is about. we have peaceful transfers of power in this country and to somehow to suggest that we are not going to do it that way. >> trump's running mate, indiana governor mike pence told our

election results stems from the bias of the media and what he says is the very real existence of voter fraud in this country, but pence insists trump will accept the election outcome. >> he's a candidate for the president of the united states of america. he has every right. he has the prerogative to wait and see how the election comes out. sometimes extraordinary circumstances develop, major. we saw that in the year 2000 when al gore conceded the election and then he withdrew his concession and tat supreme court of the united states. >> you may recall the 2011 election was one of the closest in history. george w. bush failed to win the the outcome hinged on florida where the margin was so close that it triggered a mandatory recount. al gore dropped his challenge after the supreme court voted to end the recount. so following the debate, democratic vice presidential nominee tim kaine tweeted this response to trump's comments.

our election outcome. won't condemn putin and won't defend american democracy. and he wants to be president. coming up on "cbs this morning," we will talk to tim kaine about trump's comments in the final weeks of the campaign. it's the fourth day of a massive operation to try and retake iraq's second largest city from isis. iraqi forces are fighting their way to mosul mile-by-mile, capturing outlying villages as they advance. it's a multi-pronged attack, including u.s. air artillery support. holly williams has our report from iraq. >> reporter: iraq's elite special force are battle hardened and american trained. they moved into position for a new push toward mosul. lieutenant colonel ali hussein bragged they would be inside the city in a matter of hours, but isis had up to 5,000 fighters in mosul. you're going to defeat them in a few hours?

but the truth is that mosul offensive has slowed to a crawl in the last 48 hours. these kurdish fighters built new defensive positions 15 miles east of the city. they recaptured this area on monday and now look like they are planning on staying put. in the village of kaballi, you can see one of the reasons it's such slow going. when isis fled the village two days ago, they left many bombs. they have detonated some and dismantled others. but mohammed saeed has come home to find his house still laced with explosives. he fled two years ago, along with all of the other residents. why would isis put explosives in your house? they are our enemies, he told

recaptured so far suggests that retaking mosul, a densely packed city with around a million residents, could take months. holly williams, cbs news, northern iraq. u.s. officials are trying to identify the gunman who shot and killed two american advisers in afghanistan. the gunmen attacked a gate of an afghan supply depot outside kabul. the dead americans including one soldier and one civilian. the gunman was also killed. the united states says the latest north korean missile test failed. the missile was believed to be intermediate range and it failed almost immediately after lifting off thursday. the north was unable to successfully launch similar missiles saturday just hours before, the -- north korea's nuclear and missile threats.

a court victory for an nba star.

los angeles times reports that derrick rose and two friends have been cleared of sexual assault allegations. the jury in the civil trial ruled unanimously yesterday that his accuser was not credible. the woman had sued for $21.5 million. "the new york times" says the city's mayor condemned the killing of a mentally ill woman by police. the 66-year-old woman was shot twice tuesday when she allegedly swung a baseball bat at an officer in her bill de blasio and the police commissioner said they mishandled the call. striking college teachers are stalled. faculty at the 14 state universities walked out yesterday. "time" magazine forecasts that 1 million more people will

open enrollment starts october 1st. the officer responded quickly to the call and performed cpr in the parking lot to revive him. still to come, smartphone settlement. t-mobile is fined millions over disclosures for plans.

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here's a look at today's forecast in some cities around the country. get your highlighter out. neiman marcus catalog of extravagant christmas gifts is available and, as always, if you have to ask for the cost, you there are matching vacation cars at $65,000 each. if you don't want to drive how about a gold plirivate plane fo $1.5 million. on the cbs "moneywatch," t-mobile is fined for a data slow down. and the high cost of halloween candy. jill wagner is at the new york

stocks on wall street rose led by gains in energy companies. crude oil hit the high in 15 months on the word that inventories. investors brushed off disappointing news on housing starts. for the second straight month, home builders pulled back on construction which fell about 9%. it was the slowest pace in a year and a half. gains in the construction of single family homes were offset by fewer apartments. the nation's third largest wire carrier t-mobile agreed with a 47 million dollar settlement with the government over data plans. they say t-mobile slowed down the speeds of the customers who were the heaviest users. the government said t-mobile didn't let customers know what the data use was for triggering slower speed. tesla motors will have the technology to be completely

eight cameras and that its sensors will have twice the range of current models. the technology for a fully au autonomous cars. what you spend on halloween candy might square you more than t the. thic going up since 1998. koverts have been climbing, especially for chocolate, because climate change is hurting cocoa production. that is some "bitter" news at this hour. >> yeah, right. that is why i'm giving out pencil and erasers! very practical treats. >> that's why you're going to be the least favorite mom on the block. >> yeah, exactly! jill wagner at the new york stock exchange.

anybody needs to know. still ahead, a hacker arrest. new details about the man taken into custody for alleged ties for a massive security breach in the united states. well, when you have copd, it can be hard to breathe. it can be hard to get air out, which can make it hard to get air in. so i talked to my doctor. she said... symbicort could help you breathe better, starting within 5 minutes. symbicort doesn't replace dden symptoms. symbicort helps provide significant improvement of your lung function. symbicort is for copd, including chronic bronchitis and emphysema. it should not be taken more than twice a day. symbicort contains formoterol. medicines like formoterol increase the risk of death from asthma problems. symbicort may increase your risk of lung infections, osteoporosis, and some eye problems. you should tell your doctor if you have a heart condition or high blood pressure before taking it. symbicort could mean a day with better breathing. watch out, piggies!

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here's a look at today's forecast in some cities around the country. at least five people are dead after a super typhoon pounded the northern philippi philippines. nearly 100,000 people fled their homes. when the rains and fierce wind startedover night. the strongest storm to hit the island in three years. a czech republic court must

linkedin says the arrest is connected to a major breach of its site four years ago. fbi would not confirm that. federal health officials say pregnant women should be tested for zika if they have been to miami-dade county since august 1st. the florida county is the only area in the continental u.s. where mosquitoes have spread the virus. the advisory also urges test for women who have had unprotected sex with anyone who has been to that area. the virus is linked to severe birth defects. the governments vaccinations that protect teens against a sexually transmitted disease that can cause cervical cancer. they need only two shots, not three. tests show the effectiveness is the same. officials hope the change will raise vaccination rates. coming up after your local news on "cbs this morning," analysis of last night's presidential debate. i'm anne-marie green.

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here is another look at this morning's top stories. donald trump refuses to say if he'll accept the results of the general election. trump and hillary clinton debated for the third and final time last night in las vegas. clinton called trump's comment the republican national committee says it will accept the results, even if trump doesn't. iraqi special forces have joined the battle to recapture mosul from isis. heavy fire is reported as the u.s. back troops approach iraq's second largest city. the u.s. is supplying air and artillery cover. this is the fourth day of the offensive which could take months. sight-seers are flocking for a brand-new attraction in china

it's not for the faint of heart. >> reporter: you're better off keeping your feet on the ground. china's grand canyon glass bridge is the world's highest and longest at 1,400 feet wide. it's also the world's longest fashion runway but the only people on this catwalk have to wear glass safe booties. no heels allowed. only two separate us from a thousand-foot drop. it feels unnatural but that is what is drawing 8,000 people here a day. >> very nice. >> i feel a little scared but, you know, i'm strong enough. >> reporter: the bridge first opened in august but had to close for a month for safety upgrades after too many people showed up. >> once you get used to it, it's not that scary. >> reporter: vice general manager joe chen. >> there are three layers of the

actually withstand more than 40 tons. >> reporter: to prove it, this summer had officials had visitors try to smash the glass with a sledge hammer and over it just to drive home the point but chen says this is more than just a tourist attraction. >> this bridge will present to create activities and invent power of new china. >> reporter: a new reaching record heights. adriana diaz, cbs news, in china. >> i think i'd give it a couple of months to make sure it's okay. coming up after your local news on "cbs this morning," analysis, of course of last night's presidential debate. we will hear from cbs news political director john dickerson. plus, we will tell you about an irs impersonnation scam that

that is the "cbs morning news" for this thursday. thanks for watching.

a 13-year old shot while lying in bed, also putting a local college on lock down. >> a child falls out of the back of a school bus, the investigation underway this morning z. plus the show down, we have all the big moments and analysis from jon keller. . good morning. thanks so much for joining us. >> it is thursday, october 20th. we are almost at the weekend. >> almost to the weekend. >> so close. >> get through today and