In the months since the invasion of Ukraine, Estonians, who share a border with Russia, are increasingly concerned about potential Kremlin aggression. Despite the threat being low, more than 1,000 ordinary women have volunteered to join the Women’s Defence Organisation since the conflict began. Car mechanic Mari Klandorf is one. She now spends her weekends training in first aid, guerrilla warfare and firearms and says: ‘Russia might not be coming tomorrow, or the next day, but I want to be prepared.’ The Guardian’s Kyri Evangelou reports.