KYIV, Ukraine — A Russian missile hit a Ukrainian army training ground, killing three soldiers and wounding 18 others, authorities said, in the latest attack to embarrass military officials as they struggle to make up a severe manpower shortage in the nearly 3½-year war . The Russian Defense Ministry said that the strike killed or wounded about 200 Ukrainian troops. The ministry said that Ukraine’s 169th training center near Honcharivske in the Chernihiv region was hit with two Iskander