Close to 3.5 million people caught up in the conflict in eastern Ukraine urgently need humanitarian aid, according to the U.N. — which says its assistance program has received a small fraction of the funding it needs. Populations live under the constant threat of artillery and gunfire, mines, and unexploded ordnance — and now face growing food insecurity and outbreaks of diseases like TB. For VOA, Henry Ridgwell traveled to the front line earlier this week and has this report.