in the running, republican presidential hopefuls square off in iowa, as governor rick perry of texas gets ready to officially launch his own campaign. a roller coaster ride, after a week of ups and downs, wall street faces what could be another wild day. and rampage, a run with the bulls turns deadly in south america. captioning funded by cbs thanks for joining us. i'm randall pinkston in for betty nguyen. in the news this morning, we begin with campaign 2012 and the republican candidate's first real test in iowa.

eight would be nominees took part in what would be a spirited debate last night, but the field could grow to nine this weekend and that could change the whole complexion of the race. jay dow is in washington with more. good morning, jay. >> good morning, randall. the gop candidates were all united in opposition to president obama's policies, no surprise there, but many of their exchanges highlights the differences between them as they try to separate themselves from the pack. the race for the republican presidential nomination is getting likely. >> you said the era of small government was over. that sounds a lot more like barack obama if you ask me. >> she led the effort against obama care, we got obama care. she led the effort against t.a.r.p., we got t.a.r.p. if that's your view of results, please stop, because you're killing us. >> former minnesota governor tim pawlenty and minnesota congressman michele bachmann traded sharp jabs at last

night's debate in iowa. they were fighting to stand out in the back. >> i'm running on my record and i'm proud to run on my record. >> i represent growth. >> reporter: one thing they all had in common was their target, president obama. >> i'm not going to eat barack obama's dog food. what he served up was not what i would have done if i had been president of the united states. >> reporter: the debate leads up to tomorrow's iowa straw poll. the test vote is considered a key measure of campaign strength but someone who is not on the ballot could end up stealing the spotlight. texas governor rick perry is expected to make his official announcement tomorrow in south carolina. he'll then spend the weekend campaigning in new hampshire and iowa. he was noticeably absent from last night's debate. >> was he outsmarting you? >> it doesn't bother us or my campaign. that's just one more politician. >> reporter: perry has been in office for more than a decade and is the nation's longest serving governor. some analysts think his job creation record alone could be enough to catapult him to the head of the gop race.

governor perry isn't the only potential "x" factor in the race. former alaska governor sarah palin also intends to visit iowa this weekend, although she has yet to officially announce her intentions to run. randall? >> jay, which candidates will be most affected by perry's entry into the campaign? >> you can expect governor perry to run on his ability to put people to work in texas, where the 8.2% unemployment rate is lower than the national average, but that's mitt romney's territory. perry is also the pride and joy of social conservatives and faith-based organizations, which could be seen as a direct threat to michele bachmann who enjoys support from the same groups. >> in any event he will shake it up. jay dow in washington, thanks a lot. earlier in the day, mitt romney faced a tough crowd at the iowa state fair. he was asked if wealthy americans or corporations should pay more taxes.

>> everything corporations earn ultimately goes to people. where do you think it goes? >> oh, in their pockets! >> it goes in their pockets! >> you promised us! you promised us! >> as he faced more questions and jeering from the crowd, romney said he would not raise taxes and told fairgoers not to vote for him if they did not like his answers. while they're jostling for position, president obama is back in campaign mode. on a trip to michigan,' tacked republicans in congress for getting in the way of recovery. >> you've got to tell them you've had enough of the theatrics and politics. stop sending out press releases. start passing some bills that will help our economy right now. that's what they need to do. they've got to hear from you. >> the president flew on to new york where he was the star attraction at two celebrity-studded fund-raisers last night. now to wall street. one of the most volatile period in years. yesterday the dow industrials

closed up 423 points or nearly 4%. but overall since the market began its wild swings last week, the dow has lost 753 points or 6.5%. alexis christoforous is at the new york stock exchange this morning with more on the markets. good morning, alexis. >> reporter: good morning to you, randall. asian markets struggled to find their footing. most saw gains, though the nikkei fell slightly after an early rally ran out of steam. hong kong's hang seng closed up almost 1%. markets in europe opened mixed. so far we're trying to get used to the volatility here, investors heads are still spinning. it's not just extreme, it's historic, the first time the dow has had 400 point swings for four days in a row. wall street has never seen a week like this. after thursday's 423-point jump, the dow has moved 400 points for

more than four days in a row. >> it's a roller coaster ride without the fun involved in it. >> reporter: wall street has a way of tracking the volatility through something called the fear index now far above normal levels. while there is concern about our nation after another, spain and italy being the latest, has struggled with massive debt and analysts worry even healthier economies could be exposed. >> europe is our biggest trading partner. what happens in europe matters instantly to what happens here especially with banking. >> reporter: thursday, four members of the eu, france, spain, italy and belgium, join greece in imposing a ban on short selling, which is betting on a stock to drop. many analysts blame the speculation for market dysfunction. and it could be another wild ride here on wall street today, ending out this week, we'll be curious to see if investors want to hang on to stocks over the weekend since anything that happens over the weekend in europe could affect trading here on monday. randall?

>> alexis, is there any indication we would see an end to the volatility or is this just the new normal? >> reporter: i think it's the new normal and that's what traders tell me as well. this market seems to be reactionary, moving on the slightest bit of news. yesterday we got positive news on jobs, that had us swing way up. normally we wouldn't swing much on that. today we get retail sales. anybody's guess on how we react. >> alexis, thank you. the british government says it will hunt down and punish the criminals who took part in the past week's riots. police staged daylight raids on thursday, arresting suspects based on surveillance video. upwards of 1,000 people have been arrested so far. they are also using facial recognition technology in the uk that had been considered before next year's olympic games in london. also an injured malaysian student robbed and beaten by

rioters was released by the hospital. the robbery was caught and posted on social media websites. now to syria, where government forces are pressing their crackdowns on protesters. amateur video from the city of homs appears to show bodies lying in the street and journalists were allowed to visit another distant center hama. streets were empty and buildings burned down following a week-long military assault. human rights groups say almost 2,000 people have been killed in syria since the uprising began in march. cbs news anchor scott pelley asked secretary of state hillary clinton whether it is time for syrian president bashar assad to go. >> part of what we find encouraging and trying to facilitate is for the opposition to become unified. >> you're not going to say yes to go? >> we are, i think, building the chorus of international condemnation, and rather than, you know, us saying it and nobody else following, we think it's important to lead and have

others follow as well. >> you can see more of scott pelley's interview with secretary clinton by going to cbsnews.com. the defense department is testing the fastest aircraft ever built. the hypersonic glider is ñi designed to fly at 13,000 miles an hour, getting it from new york to l.a. in 12 minutes. a small unmanned test craft was launched by rocket to california yesterday, it later crashed into the pacific but officials say they got enough data to continue development. just ahead on the "morning news" the postal service considers drastic cutbacks to save money. plus, why this little patch could make your future hospital visits a whole lot easier. first, here's scott pelley with a preview of tonight's "evening news." >> a violent tackle on the football field left him paralyzed and fighting for his life. now his insurance has run out so he's fighting a new battle, to keep his family from losing their home. that story tonight on the "cbs

evening news." i didn't understand it. i found out that connected to our muscles are nerves that send messages through the body. my doctor diagnosed it as fibromyalgia -- thought to be the result of overactive nerves that cause chronic, widespread pain. lyrica is believed to calm these nerves. i learned lyrica can provide significant relief from fibromyalgia pain. and less pain means, i can feel better and do more of what matters. [ female announcer ] lyrica is not for everyone. lyrica may cause serious allergic reactions or suicidal thoughts or actions. tell your doctor right away if you have these, new or worsening depression, or unusual changes in mood or behavior, or any swelling or affected breathing or skin, or changes in eyesight, including blurry vision, or muscle pain with fever or tired feeling. common side effects are dizziness, sleepiness, weight gain and swelling of hands, legs and feet. don't drink alcohol while taking lyrica. don't drive or use machinery until you know how lyrica affects you. i found answers about fibromyalgia.

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and make a meal of us. [ male announcer ] ask your veterinarian about k9 advantix ii. chaos in a bull ring in colombia. a bull went wild, goring a man several time and injuring several others. the most seriously injured man was pulled away from the raging animal. the man later died in the hospital. a deadly pit bull attack in pacifica, california, near san francisco. a man came home, found his wife in a pool of blood and their dog standing next to her. as paramedics tried to save the woman, their dog, which had been put in a fenced in area, escaped. >> while we were attending the victim, the dog did come out and started to approach the officers and first responders. two officers shot the dog three times and killed it. >> police say the dog may have been trying to protect the couple's other dog, a younger pit bull. in health news researchers

are developing a wireless patch that would make it much easier to monitor a patient's vital signs. it's sort of like a temporary tattoo with electronic sensors embedded in a film thinner than a human hair. when it's no longer needed it peels off like a band-aid. facing $8 billion in losses this year, the u.s. postal service considers drastic action, up to 120,000 postal workers could lose their jobs. the service wants to pull off the regular retirement health plans and make ones of its own. both steps would require congressional approval. it's still hot and dry in texas but the streak of 100-degree days in the dallas ft. worth area is over, just short of a record. going back to july 2nd the area temperatures reached triple digits every day until yesterday, when the high was only 97. that's just two days short of the record set in 1980. straight ahead your friday morning weather and in sports,

the nfl is scrambl et its preseason back on track after the long lockout. the long lockout. this...is the- a network of possibilities. in here, the planned combination of at&t and t-mobile would deliver our next generation mobile broadband experience to 55 million more americans, many in small towns and rural communities, giving them a new choice. we'll deliver better service, with thousands of new cell sites... for greater access to all the things you want, whenever you want them. it's the at&t network... and what's possible in here is almost impossible to say. is best absorbed in small continuous amounts. only one calcium supplement does that in one daily dose.

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national forecast. the latest satellite picture shows clusters of thunderstorms moving over the midwest. the northeast and west are mostly clear. later today, look for dangerous storms in the plains, storms and rain are forecast in parts of texas, but it won't be enough to dent the long running drought. stormy weather is also likely from florida to the carolinas. in sports nfl fans were ready for some football with the start of preseason games. in arlington texas, steven mcgee the cowboys quarterback completed a touchdown pass. to dwayne haar his, then connected with martin rucker for the two-point conversion. dallas squeaked by denver 24-23. in foxborough, massachusetts, the patriots quarterback quarterback quarterback mallett threw to steven brittany for a 16-yard score. in baseball austin jackson

of the tigers brought in the winning run. justin verlander struck out ten. detroit beat the indians 4-3. and in the bottom of the tenth in phoenix, diamondbacks chris young blasted a walk-off homer against houston, the 8-5 win put arizona one full game ahead of san francisco in the national league west. finally, first round action at the pga championship at the atlanta athletic club, 44-year-old steve stricker has the lead after some great approach shots and even better putts. he tied a tournament record with a 63, 7 strokes under par. tiger woods had his worst ever round in the tournament. he finished with a 77, 7 over par. if he doesn't make the cut today, he will not be eligible for a pga event for six weeks. when we return another look at this morning's top stories. and the dougherty gang gets their day in court.

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armored car warehouse. the terrifying moments for two employees. oakland police say they have the man who killed a three year old. the dramatic video showing the moments after the gunfire. a pit bull tragedy on the peninsula. a pregnant woman killed by the family dog. why he was more likely to attack. gop presidential hopefuls trade barbs. and they weren't just ganging up on president obama.,,,,

on the "cbs morning news" here's a look at today's weather, hail, gusty winds and probably a few tornadoes are in the forecast in the midwest and plains. it will also be stormy from florida to the carolinas. here's another look at this morning's top stories. all eight republican presidential candidates were on stage for a debate in iowa last night but the gop field will grow to nine this weekend when texas governor rick perry joins the race. and stock traders are bracing for what could be another round of wall street whip lash. the market has gyrated wildly for a solid week now. florida's child welfare says

casey anthony failed to protect her daughter but she will not face charges in her daughter's death. anthony was charged in her daughter's death, but a jury acquitted her last month. a child welfare agency's report was independent of the criminal investigation. the dougherty siblings, two brothers and their oldest sister, have had their first court appearance in colorado by video from the jail where they are being held. joel brown reports. >> reporter: the so-called dougherty gang went before a colorado judge to face charges of attempted murder and assault on a peace officer. all three siblings were hauled into custody wednesday night. 21-year-old ryan, 29-year-old lee and 26-year-old dylan will all be held on $1.25 million bonds. the attorney for the former fugitives wouldn't comment outside the courthouse but in court paper, lee dougherty reportedly told police "we weren't trying to hurt anyone." police say the doughertys fired

at them with an ak-47 thursday during a high-speed chase that ended in a crash on this colorado interstate. these three state troopers led the pursuit. >> you're so focused that it doesn't seep into your mind too much that, you know, these guys are really trying to kill me. >> reporter: in a week's time, the doughertys allegedly robbed a bank at gunpoint in georgia and hours before that -- >> holy -- >> reporter: -- fired at a police officer in florida during a high-speed chase in zephyr hills. the officer, who had his tires shot out, told reporters he's thankful the siblings are behind bars. >> i look forward to seeing these criminals receive the punishment they are due for putting my life in danger as well as many citizens. >> reporter: the dougherty gang is now facing a slew of criminal charges across three states. joel brown, cbs news. this morning on "the early show," how texas governor rick perry could shake up the republican presidential race. i'm randall pinkston.

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this has been a costly week for u.s. forces in afghanistan, but many american lives are being saved, thanks to fast-moving, high-tech emergency medical care. to see how it's done, correspondent seth doane flew with a medevac chopper crew in kandahar province. >> reporter: all they knew was they were flying toward a mass casualty event. having left the lights of kandahar behind, the shadowy threat this u.s. army medevac team regular face were only further obscured by darkness. 25-year-old staff sergeant kyle clark hopped out of the chopper to survey the scene. >> i jumped out, was on the ground maybe 15 seconds, they

took off, and then pretty much you're out there by yourself, you have no idea what you're walking into. >> reporter: a few minutes later they loaded casualties on two helicopters. time was their biggest enemy. these flight medics refer to having a so-called golden hour, just 60 minutes to get the seriously wounded to a hospital. >> blood sweep on the patient, figure out where he's bleeding from, once you figure that out, you fix things as you come across them. >> reporter: little was known about the back story, how five afghan police officers wound up with multiple gunshot wounds. patients come in here, what are you trying to do, just stabilize them? >> yes, trying to get them to the next echelon of care. >> reporter: daylight offers a better sense of how the flight medics of task force thunder operate, crisscrossing war torn kandahar. >> we're not going out to a place where there's a heart attack. we're going out to a place where somebody just got blown up or shot and that individual's more than likely still hanging around somewhere.

>> reporter: due to geneva convention rules these medical helicopters cannot be armed but that often makes them a target here. landing these choppers, pilots make wild zigzags, coming in fast and close, all to evade enemy fire. they're charged with serving everyone, coalition troops, to the enemy itself. do you think you've ever treated someone you suspect is being an insurgent? >> i have. i know i have. >> reporter: how is that psychologically? >> honestly you don't think about it. you go out there and you give it your all for every single patient who gets on the helicopter. >> reporter: medevac crews are on the front line, saving more wounded americans than ever before. seth doane, cbs news, kandahar, afghanistan. coming up later on "the early show," the republican debate, who won, who lost, and how texas governor rick perry

could alter the whole equation. then the stock market's wild ride. no one seems to know when it might stop. we'll have tips on where to save or stash your savings. plus love and marriage. does saying "i do" mean you don't pucker up as often. all of that coming up on "the early show." that's the "cbs morning news" for this friday. thanks for watching. make it a great day. i'm randall pinkston. -- captions by vitac -- www.vitac.com

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