Exiled Belarusian opposition leader Sviatlana Tsikhanouskaya visited Kyiv on Monday following weeks of mounting warnings from Ukrainian officials about Russian plans to draw Minsk more deeply into the war against Ukraine. Tsikhanouskaya arrived a day after one of the war’s biggest strikes on the Ukrainian capital killed four people and damaged historical sites, and amid Russian threats to launch further heavy attacks on Kyiv. Tsikhanouskaya, an opponent of Belarus’ President Alexander...