The Kremlin is concerned about the prospect of a drone attack during the annual May 9 parade in the heart of Moscow, according to a Ukrainian media outlet. Claims in the report by Obozrevatel come as Russian authorities announced that Red Square would be closed for an unprecedented two weeks ahead of the commemorations marking the Soviet victory over Nazi Germany in World War II. Citing law enforcement sources, the publication published screenshots of what it said were documents outlining what would happen in case an unmanned aerial vehicle (UAV) "is detected on the territory of the parade square." Russian...