IRPIN, Ukraine— The last minutes before the train pulled out were chaos: A mass of people pushed toward the carriage doors as uniformed men carrying machine guns screamed at slow-moving babushkas, teary-eyed girls and the many, many children straggling onto the platform.No men were allowed.... A soldier grabbed the phone of a bystander filming the fracas, smashed it on the ground, then stomped on it twice. Finally, slowly, the train began to move toward Kyiv.... A woman glued her face to the c