his third trip from his home in edinburgh, texas, to eastern ukraine. as a physician first, it s our duty and our ethics to help every needed person in the world. reporter: i understand that feeling. i have been in war zones and disaster zonings as a reporter. we were in haiti at the same time in 2010. at times, i have felt compelled to help. how much to you worry now about your own safety? every time i go back, i say, this is maybe the last time i will be going. but when i decide to come, it is a lot of fear and then a minute, i just remember my promise and people lost their life and i see their children not seeing them. reporter: but a syrian-american ran over 30 medical missions since 2011 to help his homehand from the catas catastrophic war there. but even as conflicts continue in sir kra, he finds himself in