right now ukrainian hackers are waging a massive cyber campaign against russia. cyber security experts say it amounts to a shadow war with ukraine's government hacking into russian networks to prevent attacks. joining me now, ken dilanian. ken, let's start here. experts calling this, quote, a shadow war away from the battlefield. how are ukrainians putting pressure on russia online? >> yeah, craig. there's a lot happening in this war that we are not seeing on our tv screens. cyber is one part of that. ukrainian cyber warriors have been breaking into networks in russia, stealing sensitive data and posting it on the internet. i spoke to a cyber security expert who has been in close touch with ukrainian government hackers and he says they've hacked a slew of sensitive targets, including the moscow subway, a nuclear power plant and even the cell phone of the