former-tv analyst, malcolm nance, described fighting in a special ukrainian unit called the international legion. it is not just people running around, grabbing rifles, and going on the battlefield. it is a unified force, that is a component of the ukrainian army that is fdeployed on the battle front. but another maeshor american fighting there, james vasquez, told cnn he was moving around loosely. right now, i am pretty much a ghost. me me and a british soldier him and i have been kind of going from unit to unit, you know, wherever we are needed the most. reporter: but u.s. officials are, again, warning americans don t go to ukraine to fight. this is an active war zone. this is not the place to be traveling to. reporter: state department officials say russian forces could single out americans fighting in ukraine. one official warning that captured americans could be subject to, quote, heightened risk of mistreatment. it is hard to imagine a situation, in which a capt