Getting caught in the crossfire and way too many of them are children. more than 140,000 people have been killed since the syrian conflict began. it's now about to drag into a fourth year. at least 10,000 of those killed are children and there's no end in sight to the despair. nbc news chief medical editor nancy snyderman has this special report from lebanon near the syrian border. >> reporter: the refugee camp where we find 28-year-old miriam is isolated, bitterly cold and the conditions, deplorable. it's the worst i've seen. she shares a small tent with her family, now five children, includi...