propelled by fear, they battle to board. as the train attendants beg them to step back. bags are hoisted from passenger to passenger, and within a few minutes, the train is full. careful, don't fall, don't come in, he begs. the majority on this train are women and children. men between 18 and 60 are expected to stay and fight. >> the reality on the ground there, sky news reporting on the desperation of ukrainian citizens fleeing russia this week. unicef reporting half a million of those escaping so far are children. just moments ago, ukrainian president volodymyr zelenskyy, in his latest national address, called on citizens to, quote, go on the offensive. saying, every small victory against the russians is a chance