. >> reporter: damian bostien knows what it means to swear allegiance to a cause.>> my father was in the army in the late '60s, early '70s. my grandfather was in world war ii. i was in the air force. >> so this is tika 3 tactical, bolt action rifle 308. this is something that -- >> shooting for me was something that came oddly naturally. i was really into marksmanship. >> reporter: this month instead of using his vacation time to relax on a beach -- >> i'm going to the airport. >> reporter: he's headed for the battle zone in ukraine. >> i have a sleeping bag rated to zero degrees fahrenheit or above. bringing two sets of body armor in case anybody else needs it. this has the incorporation of side sappies so that way if you get shot in the side you actually keep your ribcage intact. k bar because war. i have my rat's tourniquet. this is designed so you can tourniquet yourself so you don't bleed out alone. i'm hoping to be able to clown car all of this together because all of this weight is, you know, like -- it just adding to every footstep i take. >> reporter: bost