across the country reached their lowest levels in years thanks to waves of arctic air that came stinging in from canada. folks from coast to coast felt freezing temperatures. from the great lakes to the northern plains the mercury fell well below zero and that's without factoring in the windchill. the upper midwest is bracing for a fourth straight day of freezing temperatures. chicago endured the city's coldest day in nearly two years and it came amidst of what had been a mild winter. >> very cold. from not having cold to freezing cold now, a big change. >> bands of lake-effect snow swept through with dew points swinging into the single digits and below. doctors warn about staying to long out in the arctic air. >> you have to dress accordingly. layering is good. in temperatures like this, it doesn't take a whole lot to get frostbite. frostbite can set in in a matter

of minutes. >> and that is what makes this cold snap even more dangerous for the homeless. >> it's the kind of cold that gets down to your bone you know, so if you stay out for more than a few minutes it actually hurts. >> oh, i don't know where i'd be. under a bridge somewhere, in a tent, in someone's backyard. >> some shelters added beds and warming stations extended their hours where outreach workers ventured out to offer sanctuary from the frigid conditions. >> is there ever a time you say it's too cold, we can't go out? >> no. if our folks are outside, then we can go outside. >> well the bitter cold is expected to last into the weekend, and some areas of the country are bracing for snow. david bernard, chief meteorologist for our miami affiliate wfor, has the latest forecast. >> well, we continue to see some of the coldest weather the midwest and the northeast have seen in about two years, and it

doesn't look like things are going to get much better for today. in the southeast we're going to look for dry weather, cool, 52 in atlanta, 53 in memphis. but, of course we head north, and that's where the bitter chill will be. we'll continue to see strong lake-effect snows continuing. cleveland, only 18 today, 16 in pittsburgh. new york city, we're looking for a high of around 21. only 18 in boston. a look at montreal won't get above zero, forecast minus 6 there. across the midwest, especially across chicago, not a lot better. a high of 24. minneapolis, it's only going to be near 8 degrees. you can see the warmer weather across the plains. again, it's been pretty quiet in the midwest, but a new storm headed in and rain in portland and seattle and snow in the mountains. i'm david bernard, cbs news, miami. well, this morning the house is expected to vote on a temporary extension of the nation's debt limit. the republican-sponsored bill

would extend the u.s. borrowing limit for three months. without the extension the u.s. would be unable to pay its bills, including unemployment benefits and social security. the white house saying it supports the measure. also on capitol hill this morning secretary of state hillary clinton is about to face tough questions about the attack on the u.s. consulate in libya. four americans including ambassador chris stevens were killed. clinton's testimony had been postponed due to health issues. margaret brennan reports. >> secretary clinton is expected to face harsh questions in the senate and house. up first is the senate foreign relations committee where republicans rand paul and john mccain are among the new members. both are vocal critics of how the obama administration respond responded to the attack and they've demanded to hear from clinton for months. the secretary was unable to make her previously scheduled tm in december due to illness, so

this will be the first time that the secretary publicly answers questions about why officials denied multiple requests for additional security at the benghazi compound. she will also be asked about whether a lack of funding played a role in those decisions. clinton will try to refocus the testimony on her attempts to fix what investigators called systemic failures in leadership and management at senior levels at the state department. she will be prepped upon the department's response. a new high threat security was created and four officials were put on administrative leave as a result of the investigation, yet all four remain on the government payroll. the current chairman of the senate foreign relations committee is senator john kerry. he will not appear because he's busy preparing for his nomination hearings, which begin on thursday. he's expected to replace hillary clinton as secretary of state. margaret brennan, cbs news, washington. well there was a report

this morning between the linch to the attack in libya and the seegs in algeria. algerian officials told "the new york times" that several egyptian militants who took part in the september attack in benghazi were also involved in the hostage crisis in eastern algeria. they say the militants were killed during the assault. the attack to the gas plant was connected to neighboring city mali. they said they attacked due to the crackdown on the algerian fighter jets there. elizabeth palmer has that part of the story very when we arrived at the main military airfield, wi found u.s. transport planes had already started to land. five in all, bringing in more than a hundred tons of gear and soldiers from a military base in france. the fighter planes, armored vehicles, helicopters, they're all french, and so are the soldiers.

2,800 french boots on the ground here in mali but behind the scenes this is an international effort and war very few saw coming. the u.s. air force role is critical. >> it's a great dynamic situation, so we don't really have a full handle on that yet, but we expect the operations to continue for the next several days. >> reporter: here's what triggered the french assault. well armed figures linked to al qaeda had been taking over town after town in northern mali since last spring and imposing their own harsh brand of islamic law. last week with the extremists only 300 miles from the capital and mallian troops powerless to stop them, the french government launched a series of air strikes. this one captured by civilians on a cell phone.

when french ground forces along with malian soldiers arrived in the towns where the militants had been dug in, they had gone, leaving nothing but behind their weapons and local people grateful for what they see as their rescue. the ground troops will continue to push north. their goal is to force the extremists back into the desert, but france has warned that won't be the end of this fight. in fact, it's just the beginning of what promises to be a long and complex struggle to restore stability to this strategic and very fragile region. elizabeth palmer, cbs news. the u.s. commander in afghanistan has been cleared of allegations of professional wrongdoing. general john allen was accused of sending inappropriate e-mails to a civilian in florida, jill kelley. kellie is linked to the scandal that forced cia director david petraeus to resign. he maintained he did nothing wrong, but his nomination to be

u.s. commander of nato forces is put on hold. a surprising outcome to the election. it appears that prime minister benjamin netanyahu will be able to remain in power, but barely. he entered the race as an overwhelming favorite but his right-wing coalition suffered a shocking setback due to a strong showing by more moderate rivals. and coming up on the "morning news," musical mystery. did beyonce get a little help with her inauguration performance of the "national anthem"? th stouffer's is proud to make america's favorite lasagna... with hand-layered pasta, tomatoes and real mozzarella cheese. but what makes us even prouder... is what our real dinners can do for your family. stouffer's. let's fix dinner. [ male announcer ] when it comes to the financial obstacles

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rave performances and sung it love. not beyonce. she may have lip synced hers but now the marine corps band seeming to be changing its tune. susan mcginnis is in washington with the canned music controversy. good morning, susan. the marine corps band taped all the performances before the event. others feel duped. beyonce took the stage at president obama's inauguration this week and delivered what many called a memorable performance. >> i thought she did an excellent job. she sage really well. she was passionate. i thought it was a moving -- something moving to watch. >> reporter: but now there are reports her singing wasn't what everyone saw. the controversy erupted on tuesday when a spokeswoman for the marine corps band said the singer used a prerecorded voice track instead of singing live.

the marines later backed off that statement saying no one in the marine band is in a position to say whether it was live or recorded. sources tell cbs news beyonce did sing and her mike was hot but she was matching her voice to a prerecorded track. it's not uncommon to prerecord inaugural music in case there's bad weather or unexpected circumstances but the temperatures were mild on inauguration day and the skies were clear. it was a much colder day four years ago when cellist yo-yo ma and violinist itzhak perlman used prerecorded music at president obama's first inauguration, and whitney houston lip synced her famous rendition of the "national anthem" before the 1991 super bowl. no doubt fans will watching closely when beyonce performs at this year's halftime super bowl. we know what we heard was a

tape, the musicians apparently mimicking the movements of their instruments. we're still waiting to hear a response from beyonce's representative. >> fake or real, it was still good. straight ahead your wednesday morning business headlines. and in sports serena williams' racket won't be coming home from the australian open but will she? find out if the superstar advanced to the semifinals. exion® deep wrinkle night cream. it's clinically proven to give 10 years back to the look of skin. now for maximum results... the power of roc® retinol is intensified with a serum to create retinol correxion® max. it's proven to be 4x better at smoothing lines and deep wrinkles than professional treatments. new roc® retinol correxion® max. nothing's better than gold. new prilosec otc wildberry is the same frequent heartburn treatment as prilosec otc. now with a fancy

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here's a look at today's forecast in some cities aund here's a look at today's forecast in some cities around the country. new york, frigid with a high of 20. miami, patchy clouds, 77. chicago, snow showers, 23 the high. dallas, los angeles, 70s with a little bit of sunshine. on the "cbs moneywatch," earnings alert warnings for apple, plus football fans cry foul over the price of chicken wings. ashley morrison is here in new york with that and more. good morning, ashley. >> and good morning to you, anne-marie. tokyo's nikkei dropped 2% reaching a three-week closing low while hong kong's hang seng lost a fraction. better than expected fourth quarter earnings from travelers and depont pushed stocks to a five-year high. the dow gained 63 points to finish at 13,712. that's the highest we've seen since 2007. the nasdaq gained 8 points. apple reports its fourth quarter earnings today, and it

may have lost some of its magic. last week stocks held below $500 for the first time in 11 months and it's falling short of analysts' expectations in the last two quarters. apple says it expects to report sales of just under $500 billion. home sales were up. the national real estate association said sales dropped in september, but overall sales jumped 9% higher than in 2011. analysts say improved hiring and low mortgage rates should help boost sales this year. and break out the hot sauce. the super bowl is going to be a super weekend for chicken wings. the national council says -- get this americans will consume 1.2 billion chicken wings during the super bowl. that is a lot of wings. wholesale wings are the moist expensive ever.

$2 more a pound in the east. that will not stop anyone in my house from eating those wings. >> of course, not. >> thank you very much, ashley morrison here in new york. to sports now, and in the australian open, serena williams goes down to a fellow american. third set she misses on a return and takes it out on her racket. ouch. she gets fined 1,500 bucks for that. on match point williams fires a shot into the net and that gives 19-year-old sloane stephens a win and a trip to the open semifinals. when we return, cozy living. new york city comes up with a micro plan to deal with the housing shortage.

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dollars on just 30-seconds of t-v time. the gold rush on super bowl ads. join us for cbs 5 eyewitness news this morning... beginning at 4:30. here's a look at today's forecast in some of the cities around the country. washington, d.c., very cold, a high of 26. atlanta, 51. st. louis and denver, mostly sunny. seattle, a lot of rain there. high of 42.

well, if you're thinking of moving to manhattan, you may have big dreams but chances are you'll live small. marlie hall took a tour of the new micro apartment. >> when it's time for a party, we put a little bar. >> reporter: when it comes to small spaces it's all about creativity, especially in new york city. >> it's multi-, multi-higher functionality. that's the key. this chair folds other and turns into a stepladder. >> reporter: this apartment is on display at the museum of the city of new york. >> and a then it slides over. >> reporter: designers want to prove living in tight quarters does not have to be uncomfortable. >> we've had ten people in here without any problems. we have seating for about ten people. >> reporter: this is about maximizing every inch of space. this wall is really a closet. inside there are drawers, a garment rack that pulls down to your level, and there's even an

ironing board. there's also a bed hidden in the wall and a coffee table that turns into four chairs. sophia song is a real estate agent who says there's a growing demand for a micro apartment. >> people are more into energy savings and recycling. they're also you know paring down on, you know all those things that they collect. >> reporter: with 1 million more people expected to move into the big apple in the next two decades the city just approve add deal to test out micro apartments on the eastside. >> there's a freedom that you just don't have in a larger staff. there is storage under here. >> reporter: designers hope people realize there are big benefits to living small. marlie hall, "cbs morning news," new york. >> this is the "cbs morning news." y our new southwestern mac and cheese with grilled chicken served with soup or salad. chili's lunch combos.

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classes resume today at lone star college in houston, texas,

a day after a campus shooting. police swarmed the school yes after a fight between two men ended in gunfire. both men were wounded. one of them has been charged with aggravated assault. a maintenance worker nearby was shot in the leg. police have not offered a motive for the shooting. and police across the country are being trained in a new strategy to deal with shooters. eats called active shooter response and it was developed after the columbine school massacre. as bob orr reports, the training requires officers to head off the attacker right away. >> reporter: what you're watching is a training exercise at george mason university near washington. it began with reports of an active shooter. armed campus police officers rushed into a basketball gymnasium. they did not know the number of gunmen or if hostages had been taken.

they say the officers made the right move. first responders should not wait for backup. >> what we're teaching now is if one officer can respond and have a visual on the suspect or know where that individual is, we're telling them to make entry immediately. >> reporter: the officers move fast. following their training they bypass the wounded and focus on finding the shooter. the goal, to cut off escape paths and corner the gunman. >> you look at several incidents that have occurred in this country, individuals who have taken their lives. when have they taken their lives? when they were confronted with a police response. >> reporter: so even if you put one officer in there, they disrupt it. >> that's correct. >> reporter: a s.w.a.t. team arrived with rescue men wearing full anti-ballistic gear. as they approach and arrest the gunman. emergency s.w.a.t. began evacuating the wounded.

this kind of accelerated police action represents a complete rethinking of tactics, prompted by the poor response to the 1999 massacre at columbine high school. first responders there waited for s.w.a.t. teams to arrive even as the attack continued. >> prior to columbine, we would contain, isolate, and wait. now it's not. it's train your first responders equip your first responders, and go in an aggress aggressive situation. >> reporter: it's mentally demanding. in this classroom shooting drill, this officer was the first through the door. >> police, police. >> reporter: how do you make yourself go toward the gunfire? >> it's not easy. it's a lot of training. the human instinct is to run from gunshots, and we unfortunately are the people that are going to the gunshots. >> reporter: so police continue to sharpen their response plan. that won't stop mass shootings, but it could make a life-or-death difference when

violence erupts. bob orr, cbs news, fairfax, virginia. >> and that's the "cbs morning news" for this wednesday. thanks for watching. i'm anne-marie green. have a great day. -- captions by vitac -- www.vitac.com

>> your realtime captioner: linda marie macdonald hi, everyone. and good morning. you snuck in, didn't you? [ laughter ] >> it's wednesday, january 23rd. i'm frank mallicoat. >> i'm michelle griego. time now is just about 4:30. goo how are you doing? >> big changes. we have some rain showing up outside now, our high-def doppler radar is finally picking up some showers. this will be the first rain in some time. how long will it stick around? we'll talk about that coming up. >> and we just got a lot of

overnight roadwork out there including up and down 880 between fruitvale and 66. various lanes blocked plus more "timesaver traffic" coming up. >> you just love the camera, don't you? >> i know. keep my arm in there the whole time. [ laughter ] new this morning, oakland is hiring more help for its police department. william bratton will become the consultant. anne makovec has the vote that happened about three hours ago. >> reporter: it was a marathon meeting. just after 2 a.m., the city council approved a contract with bill bratton by a vote of 7-1 including a provision emphasizing that whatever policies may come from the consultant will not permit any racial profiling. some people in the audience don't believe it. >> what he's doing elsewhere it may have worked doesn't mean it's going to work here! and if that's the case, then