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Him from ukraine. putin will go as far in ukraine as he wants to. if he wants to take the country, ukrainians can't stop him militarily, if he happened to take ukraine and topple the government, he'll have one incredible insurgency that will make him remember afghanistan and how russians left there like we did without being able to control the country. right now he knows he can take the country, if he wants the breakaway provinces, he can keep those. this may be a bargaining chip. >> carley: tweet from mayorkis on the cyber warfare front. he says, we have no information to predict cyber threat...

And hit other global businesses like maersk, the shipping magnate. we are keeping an eye on that. the key here is be prepared. take the time to follow some of the guidance that cesa, shields up, the lead for domestic resilience. we have the time to prepare. >> all right. well, that is good news. chris krebs, thank you so much. and cnn's special coverage continues right now. >> announcer: that is cnn breaking news. good morning to our viewers here in the united states and all around the world. it is friday, february 25th. i'm john berman with brianna keilar. the breaking news, russian forces ...

Beyond europe directly targeting the united states with cyber attacks like we have seen here in ukraine. my colleague has that story. >> that's exactly right, so fox news has learned that russian target critical infrastructure here in the homeland, and that could include everything from our electrical grid to water supply systems to government communication systems, and even something like what we saw last year with the colonial pipeline ransomware attack. you'll remember that was chaotic, it caused gas shortages all over the southeast and an attack to look like that. the cybersecurity, infras...

Russians certainly have not only the capability, but the willingness to launch cyber attacks. so i think here in the u.s. we -- certainly our companies, not only the companies, but the government need of to have their shields up, and and i know that they do, and i know that the federal government is sharing critical information and intention as they can with the private sector. i think it's important to remember that, you know, private sector controls their networks, and so they have to have their capabilities up, and the federal government can protect them in doing that. i also think it's imp...

Needs to bolster the training in order to be able to effectively combat the russians. what i mean, have you mix of different types of war fare. you have wint sxer woodd and urban areas and tanks are moving in. i think the key here is training and small unit tactics to be able to sabotage, hit, attack and then retreat as needed. they have to go back to the oldest play in the book, which is unconventional type of operations, that is the key here, that comes down to training and to get that training, carley, they have to start to lean on the private sector issue the private sector, private milita...