Her dual life in pakistan and saudi arabia before coming to the United States. Did she lead her husband down their deadly path . Changing strategy, the Terror Threat prompts president obama to make a Rare Oval Office address to the nation trying to reassure anxious americans the u. S. Will prevail. But with growing criticism of his plan to fight isis, will he be forced to adopt new tactics against the terrorists . Im wolf blitzer. Youre in the situation room. This is cnn breaking news. Were following the breaking news. The fbi just revealing disturbing new details about the San Bernardino terror attack saying the couple that carried it out had been radicalized for, quote, quite some time. The fbi also says syed farook and Tashfeen Malik practiced at shooting ranges once within days of the massacre. And were learning more about the bomb lab discovered in the killers home and the 19 pipes that could have been used as explosive devices that were removed by the fbi. Were covering that and much more this hour with our guests including president obamas Deputy National security adviser ben rhodes. And our correspondents and our expert analysts they are also standing by. Lets begin with cnns kyung lah. Shes in San Bernardino for us. Kyung, you were there at this latest fbi News Conference. Update our viewers. Reporter well, what the News Conference really showed us is what investigators had suspected for some time, that there was extreme planning involved. That there was even dry runs at some of these gun ranges nearby, but most important, wolf, that the radicalization had been taking place for some time. All of it happening undetected. Investigators now believe both syed farook and his wife Tashfeen Malik were both well down the path to supporting jihad when they were photographed by u. S. Customs at chicagos Ohare Airport in july of 2014, as she first arrived in the u. S. On a fiancee visa. We have learned and believe that both subjects were radicalized and have been for quite some time. Reporter tonlt, cnn has learned prior to the attack farook not only interacted with americans being investigated by the fbi but also looked at contacted terrorist groups overseas. In a News Conference late today the fbi said there is mounting evidence the couples massacre was planned well in advance. Both of these subjects did some target participated in target practice in some ranges within the metro area. Reporter some of that practice was within days of the attack using guns allegedly bought by farooks friend enrique marquez. Tonight police are back in marquezs home. Right now our major concern the fbi, atf and the jttf is determining how those firearms, the rifles in particular got from marquez to farook and malik. Reporter as investigators in california continue to scour the couples history here, there is increasing focus on their trips overseas. We are attempting to expand that investigation out and build it and build a picture of each person, the timeline and ultimately the crimes that they committed. Reporter tonight those searches appear to be focused on two tracks, learning more about malik and her path in pakistan and tracing farooks path. His father telling cnn that his son all pakistanis coming from the major cities are liberal people. Understand. Okay. And he was going towards conservation. He was going towards what . Conservation. His views were conservative. My views were liberal. We have spent quite a bit of time at the two mosques where the couple prayed. The people who were there, those who prayed with him say this is whats most concerning to them. They know the profile to look for. Its usually a young man maybe very political, someone who may not even have a job. But this is a guy that came to the mosque all the time who had a family and had a job. Wolf, they simply didnt see this coming. All right. Kyung, thanks very much. All this certainly putting a lot of pressure on president obama,in creasingly forced to defend his plan to fight isis and keep america safe. And it prompted him to make a Rare Oval Office address to the nation. Our White House Correspondent michelle kisinsky said it was not new. Reporter the goal simply to address americans concerns and help them understand what the u. S. Strategy is for keeping them safe. The president did say that the Terror Threat is now entering a new phase. Of course how to address that. Specifically the kind of attack we just saw in california is still the subject of fierce debate with critics Many Americans wondering if that strategy is enough. Tonight, the Obama Administration is attempting to play offense on the heels of the president s primetime address detailing a strategy to defeat isis. Today his Homeland Security secretary said he will create a new intermediate designation as part of a revised terrorism alert system warning americans about threats Law Enforcement is hearing about even when theyre not specific. We need to do a better job of informing the public at large removing some of the mystery. Reporter Officials Say shooters in San Bernardino were terrorists radicalized online but did not raise alarm bells to u. S. Intelligence, something the president acknowledged overnight. This was an act of terrorism designed to kill innocent people. Reporter facing criticism that his strategy is not working and needing to reassure anxious americans in a rare address from the oval Office President obama laid out what he says the u. S. And its partners are doing. We will destroy isil and any other organization that tries to harm us. Our military will continue to hunt down terrorist plotters in any country where it is necessary. Reporter still tonight critics say president obama only defended existing strategy including air strikes, supporting Syrian Opposition and iraqi soldiers but laid out nothing new. I was disappointed last night when the president failed to lay out any new steps to fight this threat. Instead he doubled down on his strategy of hesitancy and half measures. Reporter today, the white house pushed back saying the president wants support for three initiatives including calling on congress to pass authorization for military force against isis and pressing both chambers to change gun laws making it harder for people to buy assault rifles, which the california couple used, harder for people on terror watch lists to buy guns. Are they suggesting that we should wait for somebody whos on the nofly list to go buy a gun and kill a bunch of innocent americans and then we should pass a law . Is that what were waiting for . Reporter the white house has already taken steps to toughen up security screenings for people coming into the u. S. From countries where a visa is not required. The president also Just Announced a review of the visa program on which one of those california killers came in. And the white house says it will work with congress where there is bipartisan support to tighten up screenings even more, wolf. Mental anguish ill kosinski at the white house. Thanks very much. Well get more on whats going on in just a moment, but were also following breaking political news right now. The republican president ial candidate donald trump has just issued a statement calling for a complete ban on all muslims entering the United States. Lets talk about all of this with president obamas Deputy National security adviser ben rhodes. Lots to discuss, ben. But i want to get your reaction to Donald Trumps statement that he just released saying there should be a, quote, total and complete shut down of muslims entering the United States until our countrys representatives can figure out what is going on. And just moments ago he doubled down with a tweet saying, just put out a very important policy statement on the extraordinary influx of hatred and danger coming into our country. We must be vigilant. This statement from trump as you know follows the president s Statement Last night in the oval office in which he urged americans to be tolerant, not engage in any discrimination against muslims. Whats your reaction to this statement from donald trump . Well, wolf, its totally contrary to our values as americans. You know, we have in our bill of rights respect for the freedom of religion. Muslim americans have made extraordinary contributions to our country, but its also contrary to our security, wolf. The fact of the matter is isil wants to frame this as a war between the United States and islam. And if we look like were applying religious tests who comes into this country, were sending a message that essentially were embracing that frame. And that is going to make it very difficult to partner with muslim communities here in the United States and around the world to prevent this scourge of radicalization that we need to be focused on. We should be making it harder for isil to portray this as a war between the United States and islam, not easier. All right. Lets move on. I want to talk about the fbi announcements today. The statements today that two of the San Bernardino killers had actually been radicalized for some time. Based on what you know right now and you brief the president every morning on whats going on in the intelligence area, was there some sort of intelligence failure that allowed these two to go undetected on the radar . No, wolf, look, this is very difficult. Because what we have not yet seen is that they were directed by a Foreign Terrorist Organization like isil that they were getting in communications with people in syria who were telling them to do something. The Intelligence Community obviously puts extraordinary focus on those types of communications, those types of contacts. Thats when we can see an operational plot that can be disrupted. When its simply individuals who over a period of time become more radical in their views, thats much harder to detect from an intelligence standpoint. Thats why frankly we need to have partnership with our muslim communities. As the president said last night we need Muslim Leaders to stand up and to reject this ideology. And we need to be able to work with them to spot signs of radicalization in their communities so that there can be an intervention before Something Like this terrible tragedy takes place. How would you describe that partnership right now . Well, its very active, wolf. We have our department of justice, state and local Law Enforcement has close partnerships with Muslim Leaders, with mosques, with members of the muslim community. And they Work Together so that they understand what the signs of radicalization are and they can offer a different pathway to individuals before they go down, again, the type of dark path that clearly was the case in San Bernardino. Because the notion is this is still speculative but it looks increasingly like these two killers were radicalized online. So how do you deal with that in terms of protecting americans ability to go online but at the same time monitoring what theyre doing . Well, wolf, there are a couple of issues here. One is something the president referred to last night in his address, which is we see groups like isil seeking to use encrypted technology so that there can be activity on social media, activity online that cannot be detected by intelligence and Law Enforcement agencies. We want to have a dialogue with the Technology Sector about how we can make sure that peoples right to privacy is respected but at the same time theres not a dark space where people are able to go undetected and communications for instance with terrorist organizations like isil. But secondly of course theres the greater challenge of people having access to lots of content online. People having access to extremist content. This could be the case in other ideologies. Thats again where you need the partnership with people who are interacting with people like these two terrorists in San Bernardino on a regular basis who may see changes in their behavior, may see them taking more extreme political views and religious views. And there can be some form of intervention to prevent them from going down that path of radicalization. We have much more to discuss. Ben rhodes the president s Deputy National security adviser, hes at the white house. Well continue this right after a quick break. 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We are back with president obamas Deputy National security adviser ben rhodes. Ben, the president said he had authorized u. S. Forces almost from day one to take out terrorists abroad. Those were his words, take out terrorists. Does that mean going out and killing as many of these terrorist leaders as possible . Well, wolf, if you look at the track record of this president from when he took office, weve been in a methodical campaign to remove terrorists from the battlefield. We steadily degraded al qaeda, we took out osama bin laden, we took out a number of terrorist leaders. Whether thats in afghanistan, pakistan, somalia, yemen, now in syria. I think weve had many debates for instance over the use of drones over the years. I think over the course of the last seven years people can see that every time we face a threat this president s been willing to authorize force to take out terrorist who is threaten the United States. Or when you use the words take out yo