A Moscow drone slammed into Kyiv’s key Northern Bridge on Sunday, leading to a fiery explosion during a visit from Germany’s top official — as Russian President Vladimir Putin is reportedly preparing a mass military mobilization. Dramatic footage from the Ukrainian capital showed a Russian drone crashing into the busy span during morning traffic, with a large fireball erupting from the explosion. Cars could be seen rushing through the blast area to get to the other side as fire and black smoke overtook one side of the bridge. Miraculously, only two people were injured in the incident, Kyiv Mayor Vitaliy...