morning. carla voskez loads the car. the most precious cargo is little samantha with his big brown eyes. twice a month on her days off for almost a year now, carla and sammy set off on this journey. >> for sure, diapers, snacks to keep her busy along the way. >> reporter: from phoenix to tucson, then south on highway 15 in mexico. three hours later, carla pulls up in front of the little house in the little town, 50 miles south of the border. husband oscar vosqez is there to greet them. this is where oscar lives now. there's a bullet hole in the front door. >> that happened before i moved in. it was scary. >> reporter: this young man who grew up in phoenix who wanted one day to join the marines whose high school team beat m.i.t. in a robotics