war, and for the first time, president obama says qaddafi must leave libya. we have a team of correspondents on this ever-changing story, and we begin tonight with kelly cobiella in tripoli. >> reporter: russ, good evening. it was a relatively quiet day in tripoli today, although we did hear reports of qaddafi arming civilians and sending them into neighborhoods to patrol. having said that, we saw no signs of fighting today after a very violent friday. in this working-class district of tripoli, 100 neighbors gathered to march, not to protest, but to mourn anwar elgadi, killed, they said, in demonstrations against the government friday. they described a massacre, a family killed in their car. armed african mercenaries using an ambulance for cover. >> they were killed by the ambulance. that have black people in it.

yes, from the-- they're shooting everywhere. >> reporter: they say five people were killed here friday, a day the government claimed went by without incident in tripoli. yet, these small alleys and side streets are littered with evidence of violence. bloodstained steps, broken glass, a charred police station. some are vowing to protest until the regime falls, and they've just gained a valuable ally. a general in the special forces, one of the military units most loyal to qaddafi, announced he's with the opposition. this is one of the many checkpoints along the road to zawiyah. they're keeping an eye on people coming in and going out, stopping some of the cars to check for weapons and loyalty. a green scarf or a picture of qaddafi means you're on the right side. the only crowds we found were at state-sanctioned rallies and on bread lines. if, as they stand in line for

basic provisions, these people have stopped believing their leader, they are still afraid to say so openly. >> it's not true. it's lying. where are the people killed in tripoli? where? >> reporter: not in your neighborhood? do you think in other neighborhoods? >> maybe, yeah, there is some mistakes happened with some security people. >> reporter: the government invited us here to show us that tripoli is safe, peaceful, and under their control, but the gap between that image and reality is growing. russ? >> mitchell: kelly, given that very violent friday you spoke of a few moments ago, why do you think things have been so quiet there the last 24 hours or so? >> reporter: well, we understand from the qaddafi government that they actually are negotiating with the opposition in the east. however, from what we saw on the streets today, from talking to people, it seems people in tripoli are stocking up and preparing themselves for some hard days ahead. >> mitchell: kelly cobiella in tripoli. thanks. of course, the battle for libya is being fought on several

fronts and nowhere is that more apparent than in the eastern part of the country. maundy clark now from the city of el baydah with a look at victims on both sides of the war. >> reporter: the protesters who took this video say this man is a foreign missionary brought in --mercenary by qaddafi's regime to kill demonstrators. he is seen begging for his life but we have no way of verifying who he is or what happened to him. the people's committee in al baydah took us to an improvised jail to meet prisoners they say are a mix of mercenaries and libyan soldiers who fought alongside them. he offered money to be a fighter for qaddafi? all the men denied they were hired guns. this prisoner from chad said he had been tricked into fighting. did you shoot upon demonstrators? no one would admit that. >> ( translated ): no, i didn't. >> reporter: libyan soldiers in the jail insisted they had no

idea they would be fighting protesters. on the streets outside, the army was sending a very different message. this is a parade in the city of baydah, and the military is very keen to show they're firmly on the side of the protesters. and it wasn't just soldiers. we wandered into this protest tent and found a group of doctors singing, "we're going to stay, stay, stay, until the pain goes away." across town at the hospital, these doctors were working hard at treating injured demonstrators. abu bakhr nahim, aged 19, was shot six times. you've been injured quite badly. are you happy that you went out and demonstrated that day? like all the injured we met, he insisted he had no regrets. it's worth it? >> ( translated ): it's worth it, yes. >> omar abdullah is a soldier who paid a high price for refusing an order to fire on

protesters. he got a gunshot to the arm. "how could i shoot my people?" he said. as doctors cleaned his wound, he raised his other arm to give us the protesters' victory sign. this town has seen some pretty serious fighting. protesters even managed to overrun a military base, and now they're just hoping the remaining pro-qaddafi units in the west of the country are just about to give up the fight. russ? >> mitchell: maundy clark in al baydah, libya. thank you. as we mentioned earlier, president obama had strong words this afternoon on the crisis in libya, saying flat-out qaddafi must leave now. joel brown is at the white house with more on that. joel, good evening. >> reporter: good evening to you, russ. president obama unequivocally putting qaddafi on notice in a phone call to german chancellor angela merkel. the president said qaddafi was using mass violence as his only means of staying in power, that

qaddafi had lost legitimacy and for the first time, that qaddafi should leave now. and late last night, the white house rolled out new sanctions against libya, blocking bank accounts and freezing the assets of qaddafi, his regime, and senior and his children. but the president had held back on calling for qaddafi to step down until u.s. citizens were safely out of the country. today, the president intensified the pressure. russ? >> mitchell: joel brown at the white house. thank you. the number of people fleeing libya continues to grow. at least 15,000 have crossed the border into egypt. 4,200 are expected to arrive tomorrow in crete and 22,000 have fled into tunisia. allen pizzey now from the border of tunisia and libya on the chaotic battle to get out. >> reporter: the desperation of egyptian workers fleeing libya underscores how frightening the fight to oust colonel muammar qaddafi has become. the border crossing into tunisia is frenzied as thousands fight for places on buses. their exodus from the best- paying jobs most of them ever

have is descending into mayhem. a few miles along the road, the scene is the exact opposite, but the problem no less acute. roadside markets rely on customers from libya to buy goods smuggled from their own country and sold more cheaply here, but the supply of both is drying up. "i haven't had a customer all day," this store owner says. "business is terrible." the biggest illicit item is fuel smuggled from libyan refineries and sold in makeshift stalls. oil links everyone affected by the turmoil in libya. these fleeing foreign workers need the jobs it pays for. the west needs the supplies and prices to stabilize and qaddafi's fate depends on it. he must retain control over at least some production to have any hope at all of hanging on to even a shred of power. anti-qaddafi forces have seized

controls of oil fields around the area of bengazi in the east. two-third of all libyan oil productions and the main export facilities are in a strip stretching south from the gulf of sirte, some of which has already fallen to the rebels. the other major production area is in the southwest, where no one is sure what is happening. the mad scramble of laborers clawing their way out of one of the world's top 10 oil producers shows how alarming the situation is for everyone. allen pizzey, cbs news, on the libyan-tunisian border. >> mitchell: also today, a bold arial rescue by the british took westerners working in the oil fields in libya's desert out of harm's way and brought them to safety on the small island nation of malta. harry smith is there this evening with first-person stories of americans who escaped from the turmoil. >> reporter: britain used cargo planes to airlift several hundred oilfield workers out of the desert areas of libya today. the planes landed here in malta, where a ferry, paid for by the u.s. state department, docked last night, delivering americans and others from the chaos of

tripoli. among them, diane and dennis harris from canton, ohio, who always dreamed of living and teaching abroad. six months into a two-year commitment in libya, it was all they had hoped for. >> a blast. it has been a grand adventure. so this was our retirement plan. >> yeah. >> reporter: that is, until last sunday, when the qaddafi regime's response to the protests turned ugly. they didn't see it. they heard it. >> you could hear a lot of machine gun fire. they were very quick, repetitious automatic weapons being fired-- >> it was all around us. >> reporter: days of frustration followed. their flights kept getting canceled. the ferry was their only way out. >> i really haven't had a chance to cry. i think once i get on the plane, that's probably when-- the tears are just going to flow. >> reporter: the harrises learned a lesson they won't soon

forget-- what americans take for granted, libyans are paying for dearly. >> to feel what they feel, it became very real how blessed we are in america to have what we have. and how hopeful we are the people in libya can experience that, too. >> reporter: the harrises were in love with their jobs at the international school in tripoli. they fell in love with the students, and they said as soon as it's safe, they want to go back. russ. >> mitchell: harry smith in malta, thank you. and still ahead on tonight's cbs evening news, demonstrations across the nation in support of wisconsin's public employees.

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dozens of other cities, including dallas, to show solidarity with unionized public workers in wisconsin. one of the bigger rallies was in chicago, and cynthia bowers was there. >> reporter: for the thousand or so activists who protested in chicago today in support of wisconsin's public employee unions, the rallying cry was unity. >> they'll start doing away with the unions, and then you have no rights at all. >> reporter: many here carried signs against wisconsin governor scott walker, a republican who wants to balance his state's budget shortfall by requiring public workers to pay more into their pension and health care plans and to end public employee unions' right to collective bargaining. it's that attempt to weaken decades of public union clout that is bringing tens of thousands to the capitol building in madison day after day, and to rallies around the country today. the fear that unions may one day

disappear from american life. >> i feel like we're the frog in the water and they're turning it up to boil. before we know it, it's too late. >> reporter: that's why state senator jon erpenbach has been on the run for 10 days now, one of the 14 democrats seeking exile in illinois, in effect, shutting down the senate to avoid a losing vote. >> what we did was a very extreme thing and i can't imagine any other issue that would cause us to say, "okay, we're out of here." >> reporter: public sentiment is saying you guys should be in the state dealing with this, not out of state. >> we're doing our jobs. we're standing up for, again, not only what we believe in but what the people of the state believe in. >> reporter: this divisive debate isn't isolated to wisconsin. 12 other states are currently considering curbing public employee union power as part of budget balancing. russ. >> mitchell: cynthia bowers in chicago, thank you. right now we want to tell you about a san francisco treat last night-- this one a rare one:

snowfall for the first time since 1976. there was just a dusting in hilly areas, but most there seemed pretty thrilled about it. and just ahead on tonight's cbs evening news, cold cases from the civil rights era and the students who won't let them be forgotten.

all day, all night.

>> mitchell: february is black history month, and one chapter in the long civil rights struggle still demands attention today, many years after the events in question. and that's tonight's "weekend journal," cold cases and the dedicated young people who are trying to solve them. >> the fourth of july was the last time i saw my brother alive. >> mitchell: that was 1964, and julia dobbins has been looking for her brother, joseph edwards, ever since. >> i would sit there and look for him. i never thought he was dead. >> mitchell: according to this f.b.i. report, 25-year-old edwards was last seen in vidallia, louisiana, in july 1964. investigators believe he was kidnapped and killed by a small clique of klansmen called the silver dollar group. 47 years later, his body is still missing. >> who could do a person like that? take him away just like they

were never. >> they feel some responsibility to the victims. >> mitchell: it's that mystery this group of professors and law students at syracuse university's law school hopes to solve. >> 40 more years is a long time to wait for somebody to care. >> mitchell: in 2007, professor paula johnson started the cold case justice initiative. it's the only university-based program of its kind and receives no outside funding. the students are currently investigating the edwards case, as well as 30 other civil rights-era deaths. earlier this year, the group's research helped uncover a suspect in the 1964 killing of a louisiana man, frank morris. >> people who committed these acts, who continue to roam our society freely, should not be allowed to do that with impunity. >> mitchell: because so much time has passed, solving these cases can be daunting. last summer, the justice department announced it was closing half of the 110 civil rights-era cold cases it was

pursuing, 39 of them because the suspects are dead. but families still want answers. >> for some people, justice is going to mean knowing who committed the acts because there is a continuing injustice, just in not knowing that information. >> mitchell: so these students spend countless hours combing f.b.i. files and researching old newspaper reports. >> you'll just think that nothing is ever going to be found and then finally, in the fifth hour, a little article, right there. >> mitchell: in the summer, they travel south to retrace victims' steps and search for possible witnesses. but these students say they're also trying to heal decades-old family wounds. >> it's a living-day reminder that nobody cared. >> reporter: dobbins is still waiting. her brother's case is still open and the uncertainty still painful. >> how would you feel if it was somebody in your family? you saw them one day and you never seen them again. you don't know what happened to

them? how would you feel? >> mitchell: although the justice department has closed more than 50 cases, the f.b.i. says they can be reopened if new information becomes available. and still ahead on tonight's "cbs evening news," is a mysterious street artist about to win an oscar? orchar?

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>> mitchell: and finally this evening, not all of the pre- oscar excitement will be taking place tomorrow on the famous red carpet. a bit of it is already taking place on the los angeles streets. ben tracy has more on the mystery man known as banksy. >> reporter: campaigning for an oscar by begging for votes is not always pretty, but one man has turned it into an art form. >> i'm a huge fan and i love banksy's art work. >> we have actually been looking for this spot for about 45 minutes. >> reporter: every morning of the past week, the city of los angeles has woken up to a new piece of street art by famed london artist banksy. often plastered on the side of a building. he is nominated for an academy award for his documentary called "exit through the gift shop." it's about street artists, like himself. >> the film is the story of what happens when this guy tried to make a documentary about me, but he was actually a lot more interesting than i am. >> reporter: banksy's own very valuable work creates a scavenger hunt for his fans, from parking lots in beverly

hills to water tanks in malibu. random alleys and dirt lots by the freeway. >> i have never actually seen any of his work in person. i've always seen it, like, pictures of it. >> reporter: as each piece is discovered, it is quickly documented on the internet so others can find it, such as this crayon house foreclosure. >> i had to see it, like, before it was just completely destroyed. >> reporter: a billboard, augmented by banksy on the sunset strip, was quickly ripped down and fought over. >> call the cops! call the cops! >> reporter: this week, banksy's charlie brown creation was literally cut out of a concrete wall... >> what a shame. >> reporter: ... and reportedly sold on e-bay for $8,000. so since tuesday here in beverly hills, banksy's piece of peeing dog art now has its very own security guard. of course, part of the attraction here is the mystery. while his work sells for hundreds of thousands of dollars at auction, no one has ever seen banksy. he works at night. he's never done an interview. even in his film, banksy turns the camera on himself only in

shadow. >> it's not about the hype. it's not about the money. >> he knows exactly what he's doing, and i hope something awesome happens at the oscar, like he reveals himself. >> reporter: no one knows if he will show up at the oscars or how he might disguise himself if he wins, but it's clear banksy already knows how to steal the show. ben tracy, cbs news, los angeles. >> mitchell: banksy. and that is the "cbs evening news." later on cbs, "48 hours mystery." thanks for joining us this saturday evening. i'm russ mitchell, cbs news in new york. i'll see you again back here tomorrow. good night. captioning sponsored by cbs blue skies across the bay area today. which parts did >> i do not see no white. >> no, instead mostly blue skies across the bay area today. which parts did see snow and why most of us never saw a single flake fall. a plane crash in the bay

area today where this cessna landed and overturned and the status of the pilot. what is behind the service disruptions that affected thousands of bay area transit riders today. cbs5 eyewitness news is next. blap