Military bases here in the United States. More on that in a moment because right now oklahoma is under siege from a severe storm system pap state of emergency declared in that state. People there in places like catoe county already had to hide from tornadoes earlier in the week again are burrowing in storm cellars, braces for what meteorologists say could be the worst day yet this year. Our meteorologist is tracking the storm on radar. We see pictures menacing looking clouds. How bad will it get . Put it this way, jake typically the month of may will give the u. S. One, maybe two tornado outbreaks. This is a tornado in nebraska on wednesday, 48 confirmed tornadoes. Thats an outbreak. Yesterday we had another nine. Today most likely is going to be worse than yesterday an saturday the biggest threat for the entire week. During the month of may, 276 tornadoes on average. So it is the biggest risk. It is the biggest threat for this month. Take a look. I want to mention, this was a slow start. No tornadoes in january or february. It wasnt until the end of march. Thats never happened before in recorded history. Weve got a couple of watch boxes, a new one to the north. First one from amarillo to lubbock, softballsize hail reported ten miles south in effect until 5 00 p. M. Central time. Into Oklahoma City dallas metroplex until 9 00 p. M. No tornado warnings just watches, but theyre going to pop up during the heat of the day. We have what we call not just an enhanced risk in orange but a moderate risk. We have not seen a high risk issue yet from the Storm Prediction Center and we may just have our first one tomorrow where the outbreak should be most severe. I want to quickly tell you, too. This is interesting when it comes to outbreaks in may, all of these, jake have been since 1999. So a little fodder for those who want to talk about Climate Change how about this . 10 to 11 states with snow on the back end. Mothers day in cheyenne wyoming, blizzard conditions. Amazing storm system. Watching it closely. All right. Tom, thanks so much. Well continue to come back to you throughout the hour keemp ang keeping an eye on the storm system. The top story and entire u. S. Military apparatus here in the United States put on alert. Overnight, security at all bases across the u. S. The largest ones you see on this map, inked and order, raising the threat to bravo. Predictable threat of terrorism. Threats posed by people such as ept elton simpson. Foiled terrorist. He was thankfully shot and killed by an offduty traffic cop before either could do damage. And right to jim sciutto. One official called this the new normal for military bases. What prompted this change this elevation, and what does it mean for servicemen and women . The military grew alarmed in recent days two of the overseas jihadists linked to the garland, texas, shooting tweeted out a u. S. Officer connected to the rebel training program. That tweetlished on the british, sent out on the cartoon, and by a recent publication on isis accounts on names and addresses of hundreds of military members, military taking this threat very seriously. The u. S. Military is raising the security level at every base across the country. Concerns grow over the threat from isis. It was the shooting in texas on sunday that prompted the increased security measures. Though the military says the step is not tied to a specific credible threat saying we have the same concern about the potential threat posed by violent homegrown extremists. The security level has increased to bravo. A ranking signifying an increased and predictable threat of terrorism. U. S. Bases generally have not been at this level since the tenth anniversary of 9 11. Not only doctor you have security access to those bases you have to ramp up security on the post itself. So this is going to be a big operation for the Security Forces of all of the services. Reporter the texas shooting is highlighting the threat from isis supporters hiding with the United States. Groups like isil or al qaeda now are calling publicly for attacks. In the west. Of people who they would have never recruited specifically. Have never trained. Never even met. Someone could decide on their own to answer that call with little or no notice. Reporter u. S. Authorities are investigating hundreds of people in the u. S. Who have some social media link to isis. A severe challenge for Law Enforcement to keep tabs on. It really is an expansion of how the internet has been used frankly for several years now. Both in recruitment and radicalization of young people to join terrorist groups. Reporter the new security measures mean more inspections of vehicles and i. D. S as well as surprise measures to keep potential attackers off guard. Also learning today that planned at the Wrightpatterson Air Force base in ohio cancelled because of security measures. Not across country but you might see more of in light of the changes. Jim sciutto, thanks. Dig deeper on this threat cnn counterterrorism and cia countertear original and a terrorism lick cherrer at harvard and author of isis the state of tear, live in boston. Thank you to you all. Testifying earlier wouldbe tear rifrlts and isis sympathizers in all 50 states. Given that should the threat level on these bases have been raised earlier . Look i dont think so. One of the things you want to do with raising a threat level, this is about a conversation with the American People. The first thing theyll say is what do i do . If the federal government comes in says worry, worry, worry, but we cant give you enough specificity, thats not helpful. In this case some specificity. Concern at military bases allowing base commanders to take action. Go out say, seeing threat stuff, americans but cant give you anything to do thats not helpful. You dont think threat level bravo for milbases is the new normal . Fbi directors talk about cases in 50 states but thousands of people over the course of time weve seen threats to major iconic targets. World trade center. White house. Pentagon. Weve seen threats to what we call soft targets. Things like fastfood restaurants. We saw the london and madrid metros attack. I think as the threat moves to thousands of people a harder time to give spescificity to potential targets. Any 17yearold saying ill pick whatever target i want. U. S. Ish tos say there doesnt seem to be a specific threat now from isis or any other terrorist group that caused them to raise this alert level. Do you buy that . Do you believe them . No specific threat . Well there are a number of things that have happened in the last week that seem important to me. One is that we just started training the socalled moderate rebels in syria at an undisclosed location. That just happened this week. And, of course, the attack in texas and the fact that isis has been specifically proposing that lone wolves attack military bases, along with other symbolic targets. There may be something even more specific but i wouldnt know about that. Phil how how long do you think bases can stay at this elevated threat level . What does it mean in terms of manpower and money, and at what point does the it become overreaction . The problem you face with generic threats. In my business specificity, time place, plotters what deviceless they use . Typically if you have that spes fifsty you should have enough information to disrupt the plot. Just chatter, extremists saying hey, were kind of sort of interested in unspecified time to go after military bases you dont know the back end. Sitting in the white house situation room saying we think its appropriate to alert people but not going to have the jihadis, terrorist come in say now weve decided not to do this. At some point you sit back say without additional symbol jeansintelligence ba r been at it two three weeks, back off. Congress held and urgent hearing to try to figure a solution for shutting down isis making them ineffective on social media. One of the texas shooters talked directly with an isis recruiter. What exactly do you think needs to be done in this space . Well one of the things that many experts propose is that we get much more that twister get much more serious about shutting down isis accounts. Of course, theres the problem that they start new accounts under new handles, but it does slow them down. It does take a while for followers to find the new handle. Thats one thing that has been considered and, of course, Getting Better at disseminating account or narrative is very very a very important part of the battle against isis and very important for our government. Something our government is very concerned about. Jessica, ive heard the counterargument shutting down isis accounts on twitter or elsewhere will just drive them to parts of the web that intelligence officials dont know about, whereas if out in a place where intelligence officials know where they are they can at least monitor it . Yes, but the counterargument is when the isis recruiters find a new handle the passive followers dont necessarily follow again. So in a way it can enhance intelligence because it narrows it down. Leaving out the just passive followers or perhaps people like me. Scholars. So you get you get better intelligence as a result, is the counterargument. Phil, bottom line. Hearing that the u. S. Is upping the Terror Threat level at u. S. Military bases in the homeland and in the United States itself how worried should people be out there watching . It defines what the question is whether theyre worried about their family or worried about america. If youre worried that your family will be affected tonight, id say that your concerns should be focused on things like drugs and gang violence. If your question is broader, will america face and expanded threat from the target absolutely yes. 3,000, 4,000 people in the United States threats got to go up. Phil and jessica, thank you. Hours ago the Justice Department launchened and official investigation into whether the Baltimore Police department has a pattern of using Excessive Force. Now baltimores police union is reportedly responding saying it welcomes the investigation with one request they want the mayor of baltimore investigated, too. That story is next. Meet the worlds newest Energy Superpower. Surprised . 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Just in on the same day the department of justice announced a federal investigation into the Baltimore CityPolice Department the police union there is now asking for a separate investigation into the citys mayor. Stephanie rawlingsblake. You may recall it was the mayor who initially asked attorney general Loretta Lynch to look into whether baltimores Police Department showed any pattern of Excessive Force, unlawful arrests or racial profiles sparked by the death of freddie gray. The 25yearold were man who died in police custody, leading to charges against six officers. Cnn correspondent sara sidner is live in baltimore. The relationship between the mayor and the police at least the police union in that city in baltimore, has taken something of an ugly turn . Reporter deteriorated the best word to use for it and you can see that spelled out in their statement. The police union. And the mayor had said early on that she was fine and wanted the department of justice to come in and take a look at the department and now that is exactly what the doj is doing. Freddie grays arrest and death in police custody, and the intense backlash put the city of baltimore in the national and international spotlight. Now its under scrutiny from the department of justice. The decision announced by the new attorney general. This investigation will begin immediately, and will focus on allegations that Baltimore PoliceDepartment Officers use Excessive Force including deadly force, conduct unlawful searches seizures and arrests and engage in discriminatory policing. Reporter this announcement just 11 days after the city saw some of the worst riots in recent years, and then charges brought against Six Police Officers in the death of freddie gray. The investigation launched at the urging of baltimore officials hoping to begin the healing process. Such an investigation is essential if we are going to build on the foundation of reforms that we have instituted over the past few years. Reporter attorney general Loretta Lynch and her team will look to see if Baltimore Police engaged in a pattern of civil rights violations. If unconstitutional policies or practices are found, we will seek a Court Enforceable agreement to address those issues. Reporter which means the Justice Department can change the Police Departments policies and procedures. The investigation echoes what was done in ferguson missouri after the death of Michael Brown last summer. The department of justice collecting massive amounts of electronic data and doing extensive interviews ultimately deciding that the Police Department had racial bias in its patterns and practices. Baltimore the Police Commissioner sat down with cnn and acknowledged a divide between the community and the police. There is a lack of trust within this community. Period bottom line. Thats going to take healing. Thats going to take us acknowledging as a a Police Department, not just here in baltimore but Law Enforcement as a whole weve been part of the problem. Reporter the citys fraternal order of police is firing back in a statement saying it wants the mayor to be part of the probe. Now, weve certainly seen these investigations before. Most recently of course you remember this jake. The investigation by the doj into the ferguson Police Department. I was there throughout that entire time that they were investigating. Took them about a little over earn six months to get through it. This is a much Bigger Department with a lot more data to look at. A lot more interviews to do. I mean they really do an extensive, extensive investigation. So i wouldnt expect to see the results of this for some time to come jake. All right. Sara sidner in baltimore. Thank you so much. Another policerelated story. Moving images out of new york today. Tens of thousands of police from all over the country showed up to pay respects to 25yearold brian moore, and an nypd officer whose life was cut short in a cowardly act of violence. Moore and another officer shot sitting in an Unmarked Police car over the weekend. He died of his injuries days later. 9 suspect identified as Demetrius Blackwell will likely face a firstdegree murder charge. Live in seaford, new york, where the funeral was held. An officer who made a name for himself and only on the job a few years . Reporter right. He sure had. And officer moore tonight is detective brian moore, because posthumously given that designation in his funeral today. We know he was on the force just almost five years. 150 arrests, two Commendation Medals and everyone loved him and respected him. The funeral today, there were thousands of officers here from all over the country. The procession began bringing his casket from the funeral home to here the church with hundreds of cops on motorcycles, finally the color guard, and then there were the bagpipes and then there was the funeral. You know said in the funeral that his vocation was to become a police officer, vocation go into the danger not back away from the danger. And it was new york Police Commissioner bill bratton that really broadened the thou