Police during a protest last night. Dean reynolds is in ferguson for us this evening. Dean . Reporter scott, you can see behind me here they have brought in concrete barricades at the Ferguson Police headquarters, and demonstrators do plan to be back here tonight, despite the shooting that has once again set this town on edge. Heavily armed Tactical Police converged on a house near the furging for Police Headquarters today while other detectives fanned out across adjacent streets in an urgent search for evidence that could lead them to a shooter still at large. Were going to try to do as much as we can until we find something. Reporter the dragnet started about midnight right after a small demonstration was interrupted by the crackle of gunfire. [gunfire] [screaming] one officer was shot in the shoulder, a second in the face. Both are recovering from what st. Louis county police chief john belmar called an ambush. By gods grace we didnt lose two officers last night. We could have lost two Police Officers over this. Reporter the family of michael brown, the teenager whose death at the hand of a white cop set off months of protests here condemned this escalation of violence and in washington, attorney general eric holder was blunt. This was not someone trying to bring healing to ferguson. This was a damn punk. Everybody down on the ground. Police got shot. Reporter the gunfire came just hours after Ferguson Police chief tom jackson quit, the latest in a series of official departures following a Justice Department report that criticized the city for racial bias. Victoria salsman who lives seven doors from the shooting scene, was interviewed by police, and she wondered why there was a demonstration at all, much less a shooting. I dont know what youre protesting because people are stepping down and were trying to move forward as a city and do what is right and find out what is really wrong, and it seems like people want to block that. Reporter pastor Michael Robinson who was with the protestors said whoever pulled the trigger was trying to stop fergusons racial reconciliation and deepen its divide. How big a setback would you say an incident like this is to the process . I believe it was a set wrack because it was a setup. Action is being taken. Now all of a sudden we want to shoot someone . Thats absolutely absurd. Reporter at one of the houses searched by police, three people were removed in handcuffs but no charges have been filed yet. President obama took to twitter today to say violence against police is unacceptable. Our prayers are with the officers in missouri. Path to justice, he said, is one all of us must travel. Now, scott, the Police Last Night did not fire back but officials tell us that in similar circumstances they may not be able to show restraint in the future. Pelley and both officers, we understand, have been released from the hospital. Dean, thanks very much. President obama also said today he still has confidence in his new secret Service Director after two seen your agents crashed an s. U. V. Into a crime scene after leaving a party last week. Major garrett walks us through what happened. Report at about 11 00 p. M. On march 4th, the two special agents, mark connolly, second in command of president obamas protective detail, and supervisor George Ogilvie drove an Agency Vehicle westbound on pennsylvania avenue toward toward the white house. They were heading straight toward an active investigation of a suspicious package. According to sources familiar with the incident, the agents drove through police tape and struck an orange barrel protecting evidence in the investigation. The s. U. V. Was not damaged. It appeared the two special agents were under the influence of alcohol after attending a Retirement Party for a fellow agent. Junior officers recommended field sobriety tests, but a supervisor overruled them and let connolly and ogilvie leave the scene. The department of Homeland Security n. Or Generals Office is now investigating the conduct of all involved. Maryland congressman Elijah Cummings is the top democrat on the House Committee that monitors the secret service. Whenever a Police Officer has reason to believe that someone is impaired while driving, i think they ought to be stopped and given a field sobriety test. Period. Reporter Top White House officials are irritated they learned about all this for the first time on monday four full days after the incident occurred. Scott, we have just learned that joe clancy the director of the secret service also first learned of this on monday a clear indication his agency has several problems to correct. Pelley Major Garrett reporting at the white house. Major, thank you. Tonight artillery thundered through a major bat until a test of americas strategy against isis. Iraqi forces are fighting to take back the city of tikrit from isis and were about to find out whether the u. S. Trained iraqis can win and whether this battle against terrorism will escalate into a civil war between the two branches of islam, the sunnis of isis and the shia of the iraqi government. Holly williams is covering the battle. Reporter al dour is battle scattered and deserted by its residents, but isis is gone and its black fallings are defaced. Just five miles south of tikrit, iraqi forces defeated isis in al dour on monday. It took iraqi forces more than three days of intense streettostreet fighting to recapture this small town. Tikrit is a city of 250,000 people and a much bigger challenge. If the iraqi fighters are in a triumphant mood, and Major General bahaa alazawi told us victory in tikrit is close. We have the capability to defeat terrorism and push them away from iraq. Reporter in reality, though iraqs army is weak and disorganized. Most of the fighters in the tikrit offensive are shiite muslim militiamen. They have close ties to iran, which has fueled fears in the u. S. Of rising iranian influence here in iraq, especially since an iranian general was spotted apparently commanding the offensive. The shiite militias are also accused of massacring more than 70 unarmed sunni muslim men after defeating isis in diyala province in january. Its opened a new wound in iraqs bloody religious tensions. The shiite slish militiamen are adamant it wont happen again and to prove their point they took us to meet a sunni commander who is fighting with them against isis. Were all one. Were all iraqi, qusay alzabib told us. If i had any fear of a massacre, i wouldnt be here. Pelley holly, you traveled to the area around tikrit with a shia militia called the badr brigade. What was that like . Reporter well, scott, the badr brigades have a frightening reputation. Theyre implicated in the torture and murder of thousands of sunni muslim, but with us, they were anxious to portray themselves as heros who are saving crosswalk from isis, and they told us theyll work with anyone sunnis, iranian and also americans to defeat the extremists. Pelley Holly Williams reporting on the war against isis for us from baghdad tonight. Thank you holly. After four years of vicious civil war syria is plunging into darkness. This is a satellite photo from 2012 with cities glowing at night. This is last december. 97 of the lights were out in aleppo syrias largest city with more than two million people. Nearly eight million inside syria have lost their homes. Close to four million have fled the country and half of them are children. At the Boston Marathon bombing trial today prosecutors picked up the story with the tsarnaev brothers attempt to flee. It was three days after the bombing. They just killed a Police Officer and commandeered a car at gunpoint. Don dahler reports that the jurors heard from the driver and saw a dramatic video. Reporter it was a desperate escape that changed everything. Surveillance video never before made public shows carjacking victim dun meng fleeing his captor, dzhokhar and Tamerlan Dzhokhar tsarnaev, today meng told the jury its the most terrifying moment, the most difficult decision in my life. Last year in his only tv interview, he told cbs news he had pulled over the send a text message when suddenly a man jumped into his car. I was totally shocked. I was like, whats this . What is this . I thought it was a robbery. Reporter Tamerlan Tsarnaev pointed a gun at him. Dun told the court, do you know the Boston Marathon explosion . Dun said yes, i know. He said, do you know who did it . I said, no. He said, i did it, and i just killed a cop in cambridge. Dun drove the men around to get cash from an atm machine. I thought they were going to kill me someplace in connecticut or somewhere pretty far away from people. Reporter it was when they stopped for gas and snacks that dun made his move. The younger tsarnaev was in the store. Dun told the jury, i opened the car door quickly successfully, jump out of the car dash into the street. I could feel he was trying the grab me. Dun ran into another gas station and pleaded with the attendant to call 911. He hid in the back until police arrived. The tsarnaevs had already fled but dun meng told police his s. U. V. Had a gps system. This quickly led police to the mercedes [gunfire] and a shootout that killed Tamerlan Tsarnaev. [gunfire] court is not in session tomorrow scott. Prosecutors are expected to begin presenting testimony about that violent shootout next week. Pelley don dahler in boston tonight. Don, thanks. The bodies of two u. S. Soldier verse been recovered from a black hawk Helicopter Crash off the florida panhandle. Four soldiers and seven marines were aboard when it went down in heavy fog on a Training Mission tuesday night. All are presumed lost. The leader of iran and secretary of state john kerry found one thing in common. Today both condemned that letter 47 republican senators sent to iran to warn it against a nuclear deal with the obama administration. This sort of direct interference with diplomatic negotiations may be unprecedented, and the man behind it, senator tom cotton has been in the senate only two months. We asked nancy cordes to tell us about it. Reporter senator tom cotton of arkansas is so new hes still working out of a temporary basement office, and yet with one letter he made himself known to diplomats worldwide. Germanys foreign minister called your letter, unhelpful. A french diplomat said you undermined u. S. Negotiators. Does that bother you at all . Well, all we said are the basic facts of constitutional law under our constitution. This is still the International Reaction from our allies. Well, maybe we need to send a message to the entire world. Reporter cotton is harvardeducated lawyer who also led troops in iraq and afghanistan as an infantry officer. It doesnt hurt that he just defeated a longtime democratic senator by 18 points. After serving just two years in the house, where he was known for his hawkish views he has called the talk with iran these sham nuclear negotiations. Reporter you probably wouldnt be all that upset if this letter ended up interfering with the negotiations. What we all said in the letter is if we dont approve the deal, we wont accept the deal. We did not speak about the terms of the deal. I personally oppose the terms that president obama has already foreshadowed. Reporter those terms include iran possibly being allowed to keep some of its nuclear infrastructure. I asked senator cotton today how he got so many senators to sign on. He said he went to them one by one, scott, and by the way, none of them have told us they regret it. Pelley nancy cordes with the news maker on capitol hill. Nancy, thank you very much. Senator cotton will be bob schieffers guest sunday on face the nation. After a 60 minutes investigation, fema is giving victims of Hurricane Sandy another shot at insurance payouts. And the cast of downton abby gets a royal visit when the cbs evening news continues. I have the worst cold with this runny nose. I better take something. Dayquill cold and flu doesnt treat your runny nose. Seriously . Alkaseltzer plus cold and cough fights your worst cold symptoms plus your runny nose. Oh, what a relief it is. And the wolf was huffing and puffing. Kind of like you sometimes, grandpa. 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. Doctor symbicort could help you breathe better, starting within 5 minutes. Symbicort doesnt replace a rescue inhaler for sudden 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. Grandfather symbicort could mean a day with better breathing. Watch out, piggies child giggles doctor symbicort. Breathe better starting within 5 minutes. Call or go online to learn more about a free prescription offer. If you cant afford your medication, astrazeneca may be able to help. Why are all these people so asleep yet im so awake . Did you know your brain has two systems . One helps keep you awake the other helps you sleep. Science suggests when you have insomnia, the wake system in your brain may be too strong and your neurotransmitters remain too active as you try to sleep, which could be leading to your insomnia. Ohh. Maybe thats whats preventing me from getting the sleep i need talk to your doctor about ways to manage your insomnia. Pelley david miller, the fema official in charge of National Flood insurance, has resigned two minutes after a 60 minutes report on allegations of fraud by Insurance Companies following superstorm sandy. The insurers are accused of falsifying engineering reports cheating victims out of millions in payouts. The Companies Say it isnt true, but fema says it will reopen as many as 144,000 claims. In another report on the same 60 minutes broadcast, a potentially poisonous flooring was exposed flooring that is made in china. Today the c. E. O. Of Lumber Liquidators defended his product, but he also made a surprising admission, and heres carter evans. Reporter when 60 minutes went undercover at three chinese factories that produced laminate flooring for Lumber Liquidators it exposed excessive levels of the cancercausing chemical formaldehyde in the parts that make up the wood board. At the time the Company President told Anderson Cooper the flooring complied with strict standards set by the California AirResources Board also known as carb. We neefer going to sell something thats unsafe. Reporter employees at the factory told a different story. [inaudible]. Meaning it didnt meet the companys standard. Today Lumber Liquidators liquidators c. E. O. Rob lynch revealed carbs preliminary test revealed high levels of formaldehyde before 60 minutes report. We know tests have elevated level, but we believe the results of the test have little or no bearing on the safety of the finished product. Reporter Lumber Liquidators doesnt believe in the testing method carb used which peels back the top layers of the board in order to analyze the core. Weve been engaged with carb over many months, provided them with additional information, and like others in the industry, we have expressed our concerns on the validity and applicability of the deconstructing testing method. Reporter in tests commissioned by 60 minutes, 30 of 31 boxes of the product labeled complaint were not with some emitting as much as 13 times the carb limit. They knew about the product. Reporter Michael Balero is the lead plaintiff in a class action suit against Lumber Liquidators. Hes ripping out the laminate floor in his home. They cant just sell this product and get away with it. Reporter Lumber Liquidators is still selling the chinese laminate flooring, but its now also offering independent testing of the air quality in the homes of concerned customers and scott if high levels of formaldehyde are detected coming from the floor, the company says it will consider replacing it at no cost. Pelley carter evans. Thanks, carter. And well be right back. Daily anoro ellipta. It helps people with copd breathe better for a full 24hours. Anoro ellipta is the first fdaapproved product containing two longacting bronchodilators in one inhaler. Anoro is not for asthma. Anoro contains a type of medicine that increases risk of death in people with asthma. It is not known if this risk is increased in copd. Anoro wont replace rescue inhalers for sudden copd symptoms and should not be used more than once a day. Tell your doctor if you have a heart condition, or high Blood Pressure. Tell your doctor if you have glaucoma, prostate or bladder problems, or problems passing urine as anoro may make these problems worse. Call your doctor right away if you have worsened breathing chest pain, swelling of your mouth or tongue,