Russia was hit by a wave of attacks Tuesday, with Ukrainian drones striking targets deep inside the country from the air while anti-Kremlin armed groups said they had staged a cross-border incursion on the ground. The attacks were the latest sign of Kyiv's growing ability and determination to take the fight to its neighbor's territory, and came just days ahead of a presidential election that will see Vladimir Putin re-assert his rule. The Kremlin, which has worked hard to burnish an image of domestic calm despite the war in Ukraine, said it had successfully fought off the attempted incursions. But...