KYIV, Ukraine — While the mood on the streets is calm and collected, behind the veil of composure, Ukrainians are in training for the fight of their lives. Tens of thousands of ordinary people across the Eastern European nation are learning to handle weapons, render first aid and perform other combat-related skills, as the threat of Russian invasion grows each day. Citizens are turning to experts in firearms, and even just family members, in hopes of surviving an attack and facing down their belligerent neighbor. “My daughter, now 23, taught me how to shoot,” Vlad Horbovetz, a surgeon and volunteer...
