Bomb drill's training on curriculum at Ukraine school The sound of two long bells mean that children must pack their blankets and clothing and run into a bomb shelter of a dilapidated school on the front line of Ukraine's smouldering war. The drills in the government-held village of Marinka that was once home to 10,000 people have been held monthly since the conflict broke out with pro-Russian insurgents in April 2014. IMAGES AND SOUNDBITES